The comparative effect on bone density, endometrium, and lipids of continuous hormones as replacement therapy (CHART study). A randomized controlled trial. Bleeding profile and endometrial safety of continuous combined regimens 1 mg 17beta-estradiol/trimegestone versus 1 or 2 mg 17beta-estradiol/norethisterone acetate in postmenopausal women. Comparison of two continuous combined estrogen progestogen regimens in postmenopausal women: a randomized trial. Oral hormone therapy with 17beta-estradiol and 17beta-estradiol in combination with norethindrone acetate in the prevention of bone loss in early postmenopausal women: dose-dependent effects. Comparison of four continuously administered progestogen plus oestradiol combinations for climacteric complaints. Piperazine oestrone sulphate and interrupted norethisterone: effects on the postmenopausal endometrium. Relief of vasomotor symptoms and vaginal atrophy with lower doses of conjugated equine estrogens and medroxyprogesterone acetate. Comparison of the efficacy and endometrial safety of two estradiol valerate/dienogest combinations and Kliogest for continuous combined hormone replacement therapy in postmenopausal women. A low-dose start in hormone replacement therapy provides a beneficial bleeding profile and few side-effects: randomized comparison with a conventional-dose regimen. A two-year double-blind controlled study of the clinical effect of combined and sequential postmenopausal replacement therapy and steroid metabolism during treatment. Bleeding pattern and endometrial changes during continuous combined hormone replacement therapy. The Ogen/Provera Study Group. Optimizing continuous-combined hormone replacement therapy for postmenopausal women: a comparison of six different treatment regimens. Effects of tibolone and continuous combined conjugated equine estrogen/medroxyprogesterone acetate on the endometrium and vaginal bleeding: results of the OPAL study. Endometrial safety and bleeding patterns during a 2-year study of 1 or 2 mg 17 beta-estradiol combined with sequential 5-20 mg dydrogesterone. Comparison of the difference in histopathology and cell cycle kinetics among the postmenopausal endometrium treated with different progestins in sequential-combined hormone replacement therapy. A prospective randomized controlled study comparing two doses of gestodene in cyclic combined HRT preparations on endometrial physiology. Sequential estrogen and progestogen therapy: assessment of progestational effects on the postmenopausal endometrium. Safety and efficacy of drospirenone used in a continuous combination with 17beta-estradiol for prevention of postmenopausal osteoporosis. Progestational effects of combinations of gestodene on the postmenopausal endometrium during hormone replacement therapy. 17 beta-estradiol and norethisterone acetate in low doses as continuous combined hormone replacement therapy. Acceptability and patterns of endometrial bleeding in estradiol-based HRT regimens: a comparative study of cyclical sequential combinations of trimegestone or norethisterone acetate. Effects of hormone replacement therapy on endometrial histology in postmenopausal women. The Postmenopausal Estrogen/Progestin Interventions (PEPI) Trial. The Writing Group for the PEPI Trial. Evaluation of low-dose estrogen and progestin therapy in postmenopausal women. A double-blind, prospective study of sequential versus continuous therapy. The effects of estrone (Ogen) on spinal bone density of postmenopausal women. A randomized, double-blind, placebo-controlled, multicenter study that assessed the endometrial effects of norethindrone acetate plus ethinyl estradiol versus ethinyl estradiol alone. Continuous combined piperazine oestrone sulphate and medroxyprogesterone acetate hormone replacement therapy--a study of bleeding pattern, endometrial response, serum lipid and bone density changes. [Comparative study on two different dosages of conjugated equine estrogen continuously combined with medroxyprogesterone in prevention of postmenopausal osteoporosis]. Adverse endometrial effects during long cycle hormone replacement therapy. Scandinavian Long Cycle Study Group. Constant estrogen, intermittent progestogen vs. continuous combined hormone replacement therapy: tolerability and effect on vasomotor symptoms. HRT and exercise: effects on bone density, muscle strength and lipid metabolism. A placebo controlled 2-year prospective trial on two estrogen-progestin regimens in healthy postmenopausal women. A 1-year comparison of the efficacy and clinical tolerance in postmenopausal women of two hormone replacement therapies containing estradiol in combination with either norgestrel or trimegestone. Assessment of less than monthly progestin therapy in postmenopausal women given estrogen replacement. Ultralow-dose micronized 17beta-estradiol and bone density and bone metabolism in older women: a randomized controlled trial. Endometrial safety and tolerability of triphasic sequential hormone replacement estradiol valerate/medroxyprogesterone acetate therapy regimen. Incidence of endometrial hyperplasia in postmenopausal women taking conjugated estrogens (Premarin) with medroxyprogesterone acetate or conjugated estrogens alone. The Menopause Study Group. Effective bleeding control and symptom relief by lower dose regimens of continuous combined hormone replacement therapy: a randomized comparative dose-ranging study. Long-term safety of drospirenone-estradiol for hormone therapy: a randomized, double-blind, multicenter trial. Bleeding patterns and endometrial histology during administration of low-dose estradiol sequentially combined with dydrogesterone. A prospective 1-year study of estrogen and progestin in postmenopausal women: effects on the endometrium. A comparative 2-year study of the effects of sequential regimens of 1 mg 17beta-estradiol and trimegestone with a regimen containing estradiol valerate and norethisterone on the bleeding profile and endometrial safety in postmenopausal women. Effects of two different regimens of continuous hormone replacement therapy on endometrial histopathology and postmenopausal uterine bleeding. Low-dosage micronized 17 beta-estradiol prevents bone loss in postmenopausal women. Risks and benefits of estrogen plus progestin in healthy postmenopausal women: principal results From the Women's Health Initiative randomized controlled trial.
To compare the effect of continuous norethindrone acetate (NA)-ethinyl estradiol (EE2) combinations with matching unopposed EE2 or placebo.
                A 2-year, double-blind, placebo-controlled, parallel-group clinical trial.
                Outpatients at 65 centers.
                Asymptomatic or mildly symptomatic women aged 40 years or older who had undergone the onset of spontaneous menopause within the last 5 years and who had an intact uterus.
                Patients were equally randomized to placebo or 1 of 8 treatment groups: 0.2 mg of NA and 1 microg of EE2; 0.5 mg of NA and 2.5 microg of EE2; 1 mg of NA and 5 microg of EE2; 1 mg of NA and 10 microg of EE2; 1 microg of EE2; 2.5 microg of EE2; 5 microg of EE2; or 10 microg of EE2.
                Bone mineral density (BMD) measured by quantitative computed tomography, serum lipids, and endometrial effects as assessed by rate of hyperplasia and proliferative status.
                Twelve hundred sixty-five patients entered the study. Bone mineral density increased significantly from baseline (P<.001) in the 1 mg NA-5 microg EE2 and the 1 mg NA-10 microg EE2 treatment groups at each annual assessment. Among the unopposed EE2 groups, only the 10-microg group had increased BMD above baseline, but also was accompanied by an unacceptably high rate of endometrial hyperplasia. The NA-EE2 treatment groups had a significant linear dose-response trend for increasing BMD. Increased endometrial proliferation and hyperplasia occurred with increasing unopposed estrogen doses. The combination of NA and EE2 effectively protected the endometrium against hyperplasia. The percentage of change in the ratio of high-density lipoprotein cholesterol to low-density lipoprotein cholesterol was positive for all treatment groups. The increase in triglyceride levels associated with EE2 was attenuated with NA-EE2 treatment.
                Daily treatment with NA-EE2 was well tolerated and protected the endometrium from EE2-induced proliferation and hyperplasia. The NA-EE2 treatments produced a dose-related significant increase in BMD that was not present with unopposed EE2 treatment. The overall effect of NA-EE2 treatments on lipid measures was favorable. To compare the bleeding profile and endometrial safety of continuous combined 1 mg 17beta-estradiol (17beta-E2) and 0.125 mg trimegestone (TMG) with those of two continuous combined 17beta-E2 and norethisterone acetate (NETA) regimens.
                This was a double-blind, randomized, multicenter study conducted in 12 European countries and Israel over a 2-year period. Healthy postmenopausal women with an intact uterus were given either 1 mg 17beta-E2/0.125 mg TMG, 2 mg 17beta-E2/1 mg NETA or 1 mg 17beta-E2/0.5 mg NETA for up to 26 cycles, each of 28 days.
                The percentage of amenorrheic women was greater in most cycles up to cycle 13 in the 1 mg 17beta-E2/0.125 mg TMG group than in the comparator groups. The mean number of bleeding days was similar in the 1 mg 17beta-E2/0.125 mg TMG and the 1 mg 17beta-E2/0.5 mg NETA groups, but greater in the 2 mg 17beta-E2/1 mg NETA group. No endometrial hyperplasia was observed for any group.
                Continuous combined 1 mg 17beta-E2/0.125 mg TMG exhibits a more favorable bleeding profile than 1 mg 17beta-E2/0.5 mg NETA up to 1 year, while providing an adequate protective effect on the endometrium. To compare two different continuous regimens of estrogens: conjugated estrogens or estrone sulfate with medroxyprogesterone acetate (MPA). To evaluate the impact of these two regimens on bleeding pattern, endometrial histology, lipid metabolism, and climacteric symptoms.
                Prospective, open label, single center, randomized trial.
                The menopause clinic, Centre Universitaire de Santé de l'Estrie, Université de Sherbrooke, Quebec, Canada.
                Fifty-nine postmenopausal women seeking treatment for symptomatic menopause.
                Patients were randomized to two groups. Both groups received 2.5 mg/d MPA plus 0.625 mg/d conjugated estrogens (group A: 31 patients) or 0.625 mg/d estrone sulfate (group B: 28 patients). Lipid metabolism, endometrial biopsies, and endometrial thickness (measured by vaginal ultrasound) were determined at 52 and 104 weeks.
                Six women (10%) withdrew from the study (irregular bleeding and side effects). Fifty-three patients completed the study. Amenorrhea was produced in 92.6% and 96.1% by 52 weeks, and 100% by 104 weeks for groups A and B, respectively. Endometrial atrophy was observed by histology in 92.4% by 52 weeks and in 100% by 104 weeks in both groups. The correlation between an endometrial thickness (vaginal ultrasound) of < or = 4 mm and histologic diagnosis of endometrial atrophy was found in 41 of 53 patients. In both groups the climacteric symptoms were improved and the lipid profile showed a beneficial effect.
                No significant difference was found between the two continuous regimens. Amenorrhea and atrophic endometrium occurred in 92.4% after 52 weeks of treatment. A favorable change in lipid metabolism even with the addition of MPA to estrogens was noted. Irregular bleeding was reduced and the long-term compliance with the continuous regimen was high (90%). A 2-year multicenter, double-blind, randomized, placebo-controlled study examined the efficacy and safety of different doses of 17beta-estradiol (E(2)) alone and continuous-combined oral formulations of E(2) and norethindrone acetate (NETA) versus placebo in the prevention of bone loss in newly menopausal women.
                Patients were randomized to one of seven groups: placebo, E(2) 0.25 mg, E2 0.5 mg, E(2) 1 mg, E(2) 1 mg/NETA 0.25 mg, E(2) 1 mg/NETA 0.5 mg, or E(2) 2 mg/NETA 1 mg. Treatment was a once-daily tablet taken for 26 months. The primary efficacy endpoint was the change in bone mineral density (BMD) at the lumbar spine, measured by dual-energy x-ray absorptiometry, at screening and at 13, 19, and 26 months. BMD changes at the femoral neck and trochanter were also assessed. Biochemical markers of bone metabolism were measured at baseline, and at 3, 6, 13, 19, and 26 months. Histological diagnoses of endometrial samples were tabulated for each treatment group.
                A total of 327 women were randomized and 189 women completed the 2-year trial. BMD at the lumbar spine decreased 2.3% in the placebo group. The lowest dose of unopposed E(2) prevented bone loss at the spine and hip. Significant increases in spine BMD compared with placebo occurred in all groups of treatment with E(2) and were more pronounced in the combination groups. Compared with placebo, women receiving active treatment experienced greater reductions in bone resorption markers. The effects were evident by 6 months and generally remained stable thereafter. Adverse events, primarily associated with the endometrium, were the most common reasons for discontinuation.
                There is a dose-dependent effect of E(2) on BMD. The addition of NETA seems to enhance the response in BMD observed with E(2). Low doses of E(2) (1 mg and lower) can be considered for the prevention of osteoporosis, while titrating the hormone dose to individual patient's needs. Sixty women with climacteric complaints who had not menstruated for at least 1 year were randomly allocated to receive one of four hormonal replacement regimens. All four formulations were administered daily and continuously and each contained 2 mg of micronized oestradiol-17 beta in combination with either norethisterone acetate 1 mg (group A) or 0.5 mg (group B) or megestrol acetate 5 mg (group C) or 2.5 mg (group D). The clinical efficacy was the same although the alleviation of vasomotor symptoms was somewhat slower in those women receiving preparation A. The endometrium was atrophied in nearly all biopsies. Irregular uterine bleeding was almost entirely confined to the earlier phase of the study and was substantially less with the formulation containing 1 mg norethisterone acetate. It is concluded that a continuous oestradiol-progestogen combination can be used for long-term treatment of climacteric complaints in postmenopausal women and that after 4 months the clinical efficacy is the same irrespective of the type and dose of progestogen administered. To assess the effects on the postmenopausal endometrium of two doses of oral piperazine oestrone sulphate and interrupted norethisterone in comparison with a continuously combined regimen and placebo.
                A prospective randomised trial.
                Two hundred healthy postmenopausal women.
                Random assignment to two years of treatment with alternating three-day cycles of 1.5 mg piperazine oestrone sulphate and 1.5 mg piperazine oestrone sulphate + 0.7 mg norethisterone (highEP), or alternating three-day cycles of 0.75 mg piperazine oestrone sulphate and 0.75 mg piperazine oestrone sulphate + 0.35 mg norethisterone (lowEP), or 2 mg 17 beta-oestradiol continuously combined with 1 mg norethisterone acetate (E2+NETA), or placebo.
                Effect of treatment on endometrial histology, endometrial thickness, occurrence of uterine bleeding, endometrial oestrogen and progesterone receptor content, endometrial isocitrate dehydrogenase activity, and serum placental protein 14.
                The incidence of bleeding declined with time. In the second treatment year, the women receiving lowEP reported on average 7.3 days of bleeding, highEP 16.7 days, and E2+NETA 11.2 days. Histological assessment of endometrial biopsies revealed an atrophic or slightly secretory endometrium. Serum placental protein 14 increased slightly, but was statistically highly significant, during treatment, but no cyclical variation was observed. Endometrial isocitrate dehydrogenase was low in all three hormone groups and the same low level of endometrial oestrogen receptor and progesterone receptor was found comparable to the level in the placebo group.
                Histological and biochemical assessment of the endometrium showed that interrupted hormone replacement therapy induced the same pattern in endometrial parameters as continuous combined hormone replacement therapy. To evaluate the efficacy of lower doses of conjugated equine estrogens (CEE) plus medroxyprogesterone acetate (MPA) for relieving vasomotor symptoms and vaginal atrophy.
                A randomized, double-blind, placebo-controlled trial (the Women's Health, Osteoporosis, Progestin, Estrogen study).
                Study centers across the United States.
                Two thousand, six hundred, seventy-three healthy, postmenopausal women with an intact uterus, including an efficacy-evaluable population (n = 241 at baseline).Intervention(s): Patients received for 1 year (13 cycles; in milligrams per day) CEE, 0.625; CEE, 0.625 and MPA, 2.5; CEE, 0.45; CEE, 0.45 and MPA, 2.5; CEE, 0.45 and MPA, 1.5; CEE, 0.3; CEE, 0.3 and MPA, 1.5; or placebo.
                Number and severity of hot flushes and Papanicolaou smear with vaginal maturation index (VMI) to assess vaginal atrophy.
                In the efficacy-evaluable population, reduction in vasomotor symptoms was similar with CEE of 0.625 mg/d and MPA of 2.5 mg/d (the most commonly prescribed doses) and all lower combination doses. CEE of 0.625 mg/d alleviated hot flushes more effectively than the lower doses of CEE alone. VMI improved in all active treatment groups.
                Lower doses of CEE plus MPA relieve vasomotor symptoms and vaginal atrophy as effectively as commonly prescribed doses. To compare the efficacy and endometrial safety of two estradiol valerate/dienogest combinations with Kliogest in the treatment of postmenopausal symptoms.
                This was a double-blind, randomized, multicenter study.
                Patients were randomized to estradiol valerate 2.0 mg/dienogest 2.0 mg (Climodien), estradiol valerate 2.0 mg/dienogest 3.0 mg (E2Val 2/DNG 3); or estradiol 2.0 mg/estriol 1.0 mg/norethisterone acetate 1.0 mg (Kliogest) once daily for 1 year. The primary efficacy variable was the Kupperman index. Endometrial safety was determined primarily by biopsy.
                Climodien and E2Val 2/DNG 3 were therapeutically equivalent to Kliogest (mean changes in Kupperman index -20.1, -19.0 and -18.3, respectively). No statistically significant differences existed between treatment groups in the severity of postmenopausal symptoms. The incidences of endometrial atrophy were similar in all groups. Climodien appeared to be superior to Kliogest in terms of vaginal bleeding pattern, whereas E2Val 2/DNG 3 was associated with a slightly higher incidence and greater intensity of vaginal bleeding. The incidences of adverse events were similar in all groups. A greater proportion of women in the Kliogest and E2Val 2/DNG 3 groups experienced vaginal bleeding, whereas breast problems were more common with Climodien. Climodien and E2Val 2/DNG 3 induced desirable changes in insulin-like growth factor I (decrease) and sex hormone binding globulin (increase) that were not seen with Kliogest. To compare bleeding control, efficacy and safety of two dose-ranging continuous combined hormone replacement therapy (HRT) regimens with those of a conventional continuous combined HRT.
                An open, 2-year, multicenter study was conducted in 393 postmenopausal women recruited from 16 study sites. The women were randomized to three continuous combined HRT regimens. One group (n = 131) started with 1 mg of estradiol valerate (E2V) plus 2.5 mg of medroxyprogesterone acetate (MPA), the second group (n = 130) received 1 mg E2V + 5 mg MPA and the third (n = 132) 2 mg estradiol (E2) and 1 mg norethisterone acetate (NETA). In the two E2V/MPA groups the initial E2V dose of 1 mg was increased to 2 mg after six cycles (one cycle = 28 days) to evaluate the effect of dose increase on bleeding control.
                The E2V/MPA regimens with a lower estrogen dose induced less bleeding and other adverse effects during the first six cycles than did the E2/NETA regimen. Bleeding disturbances and breast tenderness resulted in significantly more discontinuations in the E2/NETA group. After the estrogen dose increase in the E2V/MPA regimens, all groups showed comparable bleeding patterns and adverse effect profiles. The lower E2V dose was as effective as standard-dose E2 in relieving climacteric symptoms. All regimens provided excellent endometrial safety. No hyperplasias were reported.
                Continuous combined HRT should be started, and continued, with the lowest effective doses. An increase of the estrogen dose is recommended only if the initial dose is not sufficient for symptom control. A total of 151 postmenopausal women were randomly allocated to 3 groups for treatment with hormone replacement therapy. One group received combined therapy (2 mg oestradiol (E2) and 1 mg norethisterone acetate (NETA) daily), the second group was placed on sequential therapy (2 mg E2 for 12 days, 2 mgE2 and 1 mg NETA for 10 days and 1 mg E2 for 6 days), while the third was given placebo. Treatment was administered over 24 cycles of 28 days. The two active treatments were equally effective in relieving climacteric symptoms. In the combined therapy group, 62% of the women experienced spotting and/or breakthrough bleeding during the first 3 cycles; thereafter this proportion decreased to between 3 and 18% in each of the following three-cycle periods. Sixty-four percent (64%) of these women had no more bleeding after the first 3 cycles. Endometrial atrophy was detected in 93% of the women in this group after 24 cycles of therapy. Bleeding irregularities occurred during the first 3 cycles in 27% of the patients treated with sequential therapy and in 21% of those receiving placebo. In the subsequent 3-cycle periods these figures fell to below 10% in the 2 groups. In all 3 groups weight remained stable but blood pressure increased equally in the actively treated groups and the placebo group. The levels of follicle-stimulating hormone (FSH), sex-hormone-binding globulin (SHBG) and the free fraction of E2 in serum were significantly lower in the combined therapy group than in the sequential therapy group. The higher level of free E2 in the latter group may have been caused by a decrease in metabolism associated with the increased SHBG concentration. It was concluded that combined treatment with E2 and NETA might provide an alternative to sequential treatment in postmenopausal women willing to tolerate the initial high risk of breakthrough bleeding/spotting in order to avoid subsequent regular bleeding. In the subgroup of women in whom bleeding irregularities continue, sequential treatment should be considered. To establish the optimum oral daily dose of micronized medroxyprogesterone acetate, given in combination with a fixed oral dose of estrone (E1) sulfate as hormone replacement therapy, that provides endometrial protection and induces cessation of vaginal bleeding.
                This multicenter, randomized, double-blind study was conducted for 2 years. Five hundred sixty-eight postmenopausal women were randomized to take E1 sulfate 1.25 mg daily and one of three doses of medroxyprogesterone acetate (2.5, 5, or 10 mg) daily. Any vaginal bleeding was recorded by patients in a daily diary, and endometrial biopsies were performed at entry into the study and at 3, 12, and 24 months.
                Forty-two percent of all women reported some bleeding at month 3 of therapy. However, by month 6, 76.5, 80.1, and 80.9% of women were amenorrheic in the 2.5-, 5-, and 10-mg medroxyprogesterone acetate groups, respectively. Over time, the percentage of women with no bleeding increased in each group, and by 24 months 91.5, 89.9, and 94.3% were amenorrheic in the 2.5- and 10-mg medroxyprogesterone acetate groups, respectively. Approximately 10% of women continue to have some bleeding, regardless of the dose of medroxyprogesterone acetate. There were no statistically significant differences in the number of women with bleeding at any time point between the three groups. There were no cases of endometrial hyperplasia reported in the study population over the 2 years.
                All three studied doses of medroxyprogesterone acetate, given in combination with 1.25 mg of E1 sulfate, provide adequate endometrial protection and render approximately 80% of women amenorrheic by 6 months of therapy. We sought to determine the optimum estradiol valerate-medroxyprogesterone acetate regimens for efficacy and safety.
                We performed a 24-month, randomized, double-blind phase II study. Four hundred nineteen women who were postmenopausal for at least 3 years were placed in six parallel treatment groups and received 1 or 2 mg estradiol valerate with either 2.5 or 5 mg medroxyprogesterone acetate. In two groups the dose of estradiol valerate was increased from 1 to 2 mg estradiol valerate after 6 months.
                A marked improvement of climacteric symptoms was observed, and most women had no bleeding even during the first 3 months of treatment. The best bleeding pattern was achieved with 1 mg estradiol valerate and 2.5 or 5 mg medroxyprogesterone acetate, and in most groups the bleeding pattern improved over time. No cases of hyperplasia were observed.
                All regimens alleviated climacteric symptoms and provided excellent bleeding control, even during the early weeks of treatment. A choice of various dose combinations offers flexibility of dosing, thus enabling therapy to be tailored to the needs of individual women. The primary objective of the Osteoporosis Prevention and Arterial effects of tiboLone study was to compare the effect of tibolone and placebo on the progression of the common carotid artery intima-medial thickness; the common carotid artery intima-medial thickness and bone data will be presented elsewhere. A secondary objective was to assess the effects of tibolone (2.5 mg), continuous combined conjugated equine estrogen/medroxyprogesterone acetate [0.625/2.5 mg], and placebo on the endometrium and vaginal bleeding; these results are the subject of this report.
                This 3-year, three-arm, international, randomized, double-blind, parallel group, placebo-controlled clinical trial enrolled 866 postmenopausal women (aged 45-79 years). The endometrium was assessed by annual transvaginal ultrasound scans and end-of-study biopsies (United States/United Kingdom centers only). Vaginal bleeding was recorded in daily diaries.
                Endometrial thickness measured by transvaginal ultrasound scan increased slightly during the first year with tibolone and conjugated equine estrogen/medroxyprogesterone acetate, without any further progression. After 3 years, there were no significant differences between the tibolone, conjugated equine estrogen/medroxyprogesterone acetate, and placebo groups in the incidence of proliferation (1.4%, 4.8%, and 0%, respectively), endometrial hyperplasia (0% in all groups), or cancer (1, 0, and 1 case, respectively). During the first 3 months, bleeding/spotting rates were greater with conjugated equine estrogen/medroxyprogesterone acetate (48%) than with tibolone (18%; P < .001) or placebo (3%; P < .001). During 3 years of treatment, the incidence of bleeding/spotting was 66%, 48%, and 23% for conjugated equine estrogen/medroxyprogesterone acetate, tibolone, and placebo, respectively. The mean number of bleeding/spotting days was greater in the conjugated equine estrogen/medroxyprogesterone acetate than the tibolone or placebo groups (61, 28, and 7 days, respectively; P = .023 vs tibolone; P < .0001 vs placebo). The mean number of bleeding/spotting episodes was also greater in the conjugated equine estrogen/medroxyprogesterone acetate group (13 episodes) compared with the tibolone group (six episodes; P < .001) and placebo group (four episodes; P < .001). Vaginal bleeding was more commonly reported as an adverse event with conjugated equine estrogen/medroxyprogesterone acetate than tibolone (26.4% vs 10.8%, P < .0001) and as the reason for premature discontinuation (9% vs 2%, P = .001).
                Compared with conjugated equine estrogen/medroxyprogesterone acetate, tibolone has a better tolerability profile with respect to vaginal bleeding but with a similar endometrial safety. These results reinforce the endometrial safety profile of tibolone. To assess the endometrial safety and bleeding patterns of 17 beta-estradiol sequentially combined with dydrogesterone.
                Endometrial safety and bleeding patterns were assessed in 579 postmenopausal women randomized to oral treatment with placebo, 1 mg/day 17 beta-estradiol sequentially combined with 5 or 10 mg/day dydrogesterone for the last 14 days of each 28-day cycle, or 2 mg/day 17 beta-estradiol sequentially combined with 10 or 20 mg/day dydrogesterone for the last 14 days of each 28-day cycle. Treatment was continued for 26 cycles. Proliferative endometrium, endometrial hyperplasia and endometrial malignancy in the end-of-study biopsy were considered as inadequate progestational responses.
                Biopsies were not available in 137 women mainly because of an insufficient treatment period or non-compliance. An adequate progestational response was seen in more than 98% of the 442 women who underwent biopsy after treatment. Bleeding data were not available in 193 women, most of whom did not remain on treatment for the full 26 cycles. The 1-mg 17 beta-estradiol dose was associated with less cyclic and intermittent bleeding than the 2-mg dose. Higher doses of dydrogesterone were associated with a higher incidence of cyclic bleeds and a later day of onset, while duration, severity and regularity were similar in all groups irrespective of estradiol or dydrogesterone dose.
                Sequential combinations of 1 mg 17 beta-estradiol with 5 or 10 mg dydrogesterone and 2 mg 17 beta-estradiol with 10 or 20 mg dydrogesterone are associated with very good endometrial safety. The incidence of bleeding is lower with the 1-mg dose of 17 beta-estradiol. To investigate the difference in histopathology and cell cycle kinetics in the menopausal endometrium treated with sequential-combined hormone replacement therapy (HRT) using different types and doses of progestins.
                A randomized, double-blind, 1-year study was conducted. In a menopause clinic of a university hospital, 241 postmenopausal women using HRT were included for the study of histopathology and cell cycle analysis. Conjugated equine estrogens, 0.625mg/day, were administered for 25 days (days 1-25) of each month, and the following were also administered for 14 days (days 12-25): in group A ( n= 102), medroxyprogesterone acetate (MPA), 5 mg/day; in group B ( n= 66), MPA, 10mg/day; and in group C ( n= 73), dydrogesterone, 20mg/day. Endometrial sampling was performed after at least 10 months of treatment. Fifty-two premenopausal women were also enrolled for the comparative studies (group Y). The S-G2-M fractions in the cell cycle were used as the marker of proliferation.
                Most menopausal endometria were normal regardless of the regimens of HRT. Endometrial hyperplasia was only found in two cases (both in group A). The S-G2-M fractions of the endometrial cells in all three menopausal groups showed no statistically significant difference. It appeared that S-G2-M fractions increased from normal postmenopausal to normal premenopausal endometria to postmenopausal hyperplasia to premenopausal hyperplasia. The S-G2-M fractions of the normal menopausal endometrial cells were lower than those of the premenopausal controls either in normal or in hyperplastic categories.
                Our study showed that there is no difference between the effect of MPA and dydrogesterone used in sequential-combined HRT based on the cycle kinetics of the menopausal endometrium. Postmenopausal women taking oestradiol 17-beta 2 mg daily were randomized to receive either 25 or 50 microg gestodene from day 17 to 28 of the cycle in a double-blind study. Placental protein P14 (PP14) and CA 125 concentrations in uterine flushing, endometrial morphology and irregular bleeding after 12 cycles of study were observed. Eleven and 12 women in the 25 and 50 microg groups respectively completed the study. There were no significant differences in pre-treatment biochemical and morphological indices between the groups. The median PP14 concentration increased from 332 to 5800 ng/ml (P < 0.001) and from 145 to 27 160 ng/ml (P < 0.001) in the 25 and 50 microg gestodene groups respectively. No between-group significant rise of PP14 was observed. Similarly, no significant change was seen between the initial and post-treatment concentrations of CA 125 for either group. All biopsies were atrophic at inception of the study, and both regimens produced secretory endometrial transformation in the majority of biopsies. No between-group difference was observed in the morphometric indices measured, or any significant correlation between the concentrations of PP14 or CA 125 and morphology. The mean number of days of withdrawal bleeding (3.8 and 4.2 days for 25 and 50 microg respectively) were similar. In conclusion, both regimens produced a significant rise in uterine flushing concentrations of PP14, but not CA 125. PP14 is a sensitive biochemical marker in the assessment of endometrial response to hormone replacement therapy. Healthy postmenopausal women were randomly assigned to groups receiving 28-day treatment cycles of estradiol (E2) valerate (2 mg, days 1-21) combined with medroxyprogesterone acetate (10 mg, days 12-21) (N = 18), 17 beta-estradiol (1.5 mg, days 1-24) combined with desogestrel (150 micrograms, days 13-24) (N = 20), or placebo (N = 18). The progestational effects on the endometrium were assessed by histology, uterine bleeding pattern, and biochemical markers of secretion measured in endometrial tissue (E2 and isocitrate dehydrogenase) and serum (placental protein 14). After 2 years of therapy, 24 women in the hormone groups had secretory endometrium and 13 had atrophic endometrium; in the placebo group, the results were one and 15, respectively. Withdrawal bleeding generally started between days 9-12 after the addition of progestogen in the E2-medroxyprogesterone acetate group, and between days 14-17 in the E2-desogestrel group. All three biochemical markers of secretion were increased in each of the hormone-treated groups compared with the placebo group (P less than .01-.001). Serum placental protein 14 was twice as high in the secretory as in the atrophic phase (P less than .01). Isocitrate dehydrogenase, but not E2 dehydrogenase, was also higher in the secretory phase (P less than .05). Only serum placental protein 14 was significantly related to the uterine bleeding pattern (P less than .01). We conclude that serum placental protein 14 reflects both endometrial histology and bleeding pattern and may be a useful marker of progestational effects on the endometrium. The markers of secretion measured in endometrial tissue are not as reliable for endometrial histology or bleeding pattern. To evaluate the combination of 17beta-estradiol and continuous drospirenone for the prevention of postmenopausal osteoporosis.
                A total of 180 (75%) healthy postmenopausal women aged 45-65 years completed a 2-year prospective study. Bone mineral density (BMD) at lumbar spine, hip and total body as well as endometrial thickness, markers of bone turnover and serum lipids were measured regularly. Treatment groups were given placebo or 1 mg 17beta-estradiol combined with 1, 2 or 3 mg drospirenone daily.
                BMD at the lumbar spine, hip and total body increased by 7, 4 and 3%, respectively, in all hormone groups versus placebo (all p < 0.001). Bone markers all decreased accordingly (serum osteocalcin 52%, serum bone specific alkaline phosphatase 36%, serum CrossLaps 67% and urinary CrossLaps 75% from baseline; all p < 0.001). Total cholesterol and low-density lipoprotein cholesterol decreased by 8% and 13%, respectively (both p < 0.001). High-density lipoprotein cholesterol and triglycerides remained unchanged. No significant dose-related effects were found. Endometrial thickness increased by 1.2 mm only in the 1-mg drospirenone group (p < 0.01 versus placebo).
                The combination of 17beta-estradiol and drospirenone has a positive effect on BMD and a potentially beneficial effect on lipids. Although endometrial thickness increased slightly, the safety of the endometrium was assured, as no cases of hyperplasia or cancer occurred. The aim of the study was to assess the dose-response effects on the postmenopausal endometrium of 3 sequential combined hormone replacement regimens and 1 continuous combined hormone replacement regimen of estradiol and gestodene. Study Design: In this 2-year double-blind, placebo-controlled study, 278 healthy postmenopausal women received either 2 mg estradiol sequentially combined with 50 microg or 25 microg gestodene, 1 mg estradiol sequentially or continuously combined with 25 microg gestodene, or placebo.
                All 4 hormone treatment regimens produced a safe endometrial histologic appearance. The regimens that were based on the lower dose of 1 mg estradiol was associated with less uterine bleeding than were those that were based on 2 mg estradiol. For sequentially opposing the 2 mg dose of estradiol, the dose of 25 microg gestodene was less efficient in producing secretory activity than was the dose of 50 microg gestodene. The measurement of placental protein 14 in serum reflected the secretory transformation of the endometrial buildup.
                The reduction in bleeding episodes associated with regimens with lower estradiol doses may lead to improved long-term therapy compliance by menopausal women. The potency of progestogens can be assessed by measuring the serum concentration of placental protein 14. To evaluate low doses of 17 beta-estradiol (E2) and norethisterone acetate (NETA) as continuous combined hormone replacement therapy (HRT) in their effects on vasomotor symptoms, bleeding episodes, endometrial histology and mastalgia.
                Sixty postmenopausal women were randomly allocated to three treatment groups and were given 1 mg E2 and 0.25 mg NETA (A), 1 mg E2 and 0.5 mg NETA (B) and 2 mg E2 and 1.0 mg NETA (C) in daily doses. The treatment period was 1 year.
                A similar statistically significant reduction of climacteric symptoms (P < 0.05) was found in all groups. Bleedings, mainly as spottings, occurred most commonly during the first treatment months. Fewer bleeding episodes and a higher percentage of amenorrhea was noted in group B compared to the other groups but did not reach statistical significance. All endometrial biopsies showed atrophy. Women in group A and B had less severe mastalgia (P < 0.05) compared to group C, given higher doses of steroids.
                Postmenopausal women taking 1 mg of E2 plus 0.5 mg NETA as continuous combined HRT reported a marked reduction of climacteric complaints and good bleeding control. No endometrial proliferation was detected after 1 year of treatment. This type of therapy may be beneficial especially for elderly women, in whom bleeding may be annoying. This randomized, double-blind, multicenter study was planned to compare the efficacy and tolerance of a novel oral regimen containing estradiol (2.0 mg) sequentially combined with trimegestone, at a daily dose of either 0.25 mg or 0.5 mg, with a standard hormone replacement therapy containing estradiol and norethisterone acetate (E2 + NETA) in the treatment of climacteric symptoms.
                The study was conducted over 13 cycles, each of 28 days, and involved 487 subjects, of whom 349 completed the study.
                All three treatments were equally effective in alleviating hot flushes and showed a progressive and significant reduction in the value of the Kupperman index. The treatments diminished equally effectively urogenital signs and symptoms. All treatments were well tolerated and the incidences of adverse events associated with each treatment were similar across the treatment groups. The duration of expected withdrawal bleeding was shorter in the estradiol + trimegestone 0.5 mg group than in the estradiol + trimegestone 0.25 mg or E2 + NETA group.
                All treatments were effective and well tolerated, providing significant relief from climacteric symptoms. Treatment with estradiol + trimegestone 0.5 mg provided the most favorable bleeding pattern. To report the histological findings of the endometrium of postmenopausal women who were randomized to receive placebo, estrogen only, or one of three estrogen plus progestin (E+P) regimens in the Postmenopausal Estrogen/Progestin Interventions (PEPI) Trial.
                A 3-year multicenter, randomized, double-masked, placebo-controlled trial.
                A total of 596 postmenopausal women aged 45 through 64 years without contraindication to hormone therapy.
                Participants were randomized and stratified in equal numbers to one of the following treatments in 28-day cycles: placebo, 0.625 mg/d of conjugated equine estrogens (CEE), 0.625 mg/d of CEE plus 10 mg/d of medroxyprogesterone acetate (MPA) for the first 12 days, 0.625 mg/d of CEE plus 2.5 mg/d of MPA, or 0.625 mg/d of CEE plus 200 mg/d of micronized progesterone (MP) for the first 12 days.
                Histology of endometrium collected at baseline, annual, or unscheduled visits by biopsy, curettage, or hysterectomy.
                Intention to treat.
                During follow-up women assigned to estrogen alone were more likely to develop simple (cystic), complex (adenomatous), or atypical hyperplasia than those given placebo (27.7% vs 0.8%, 22.7% vs 0.8%, and 11.8% vs 0%, respectively) for the same types of hyperplasia (P < .001). Participants administered one of the three E+P regimens had similar rates of hyperplasia as those given placebo (P = .16). The occurrence of hyperplasia was distributed evenly across the 3 years of the trial. Women taking estrogens alone also had more unscheduled biopsies (66.4% vs 8.4%; P < .001) and curettages (17.6% vs 0.8%; P < .001) than women receiving placebo. The number of surgical procedures was similar for women receiving placebo and women receiving the E+P regimens (P = .38). Of the 45 women with complex (adenomatous) or atypical hyperplasia, study medications were discontinued in all, and the biopsy results of 34 (94%) of 36 women with hyperplasia reverted to normal with progestin therapy. The remainder had dilatation and curettage (n = 2) or hysterectomy with (n = 2) or without (n = 6) prior medical therapy, or refused further biopsies (n = 1). One woman developed adenocarcinoma of the endometrium while receiving placebo.
                At a dosage of 0.625 mg, the daily administration of CEE enhanced the development of endometrial hyperplasia. Combining CEE with cyclic or continuous MPA or cyclic MP protected the endometrium from hyperplastic changes associated with estrogen-only therapy. In this prospective, double-blind study, we evaluated the efficacy and safety of low-dose estrogen and progestin replacement therapy in 36 postmenopausal women who were administered oral medroxyprogesterone acetate (MPA) cyclically or continuously in combination with conjugated equine estrogen (CEE) 0.625 mg daily. In the sequential group, MPA (5.0 mg) was administered daily for 12 days of each 25-day treatment cycle. In the two continuous groups, MPA was administered without interruption at a daily dose of either 2.5 mg or 5.0 mg for 12 treatment cycles. Of the 36 women in the study, 29 women completed the one-year protocol. The clinical and metabolic responses were assessed before and every three cycles during the 12 cycles of treatment. Endometrial biopsies and lumbar bone density scans were performed before and during the last week of the 12th treatment cycle. Vasomotor and urogenital symptoms improved in all women. Cyclic menstrual bleeding occurred in all patients on sequential therapy, and proliferative endometrium was noted in two of these women. All patients in both continuous treatment groups experienced amenorrhea after the fifth cycle of therapy, and all endometrial biopsies were atrophic or inactive. From the 3rd through the 12th month of cycle, favorable lipid and lipoprotein changes occurred in all treatment groups. Lumbar bone mineral density improved significantly (P < .05) by an average of 6.41% in all patients.(ABSTRACT TRUNCATED AT 250 WORDS) The effects of cyclical treatment with estrone sulfate (0.3, 0.625, or 1.25 mg), plus calcium carbonate, on spinal trabecular bone density were compared with placebo in 120 postmenopausal women in this 2-year, multicenter, double-blind study. While the placebo and 0.3-mg treatment groups lost bone density (-3.6% and -5.1%), the 0.625- and 1.25-mg treatment groups experienced no significant change from baseline at 24 months (-0.8% and +0.7%). The 1.25-mg treatment group was significantly different from the placebo group at 12, 18, and 24 months. Although the 0.625-mg treatment group was significantly different from the placebo group only at 18 months, the data suggest that 0.625 and 1.25 mg of estrone sulfate had different effects than placebo and 0.3 mg of estrone sulfate and, given with supplemental calcium, are effective doses for the prevention of spinal bone loss. The purpose of this study was to determine the incidence of endometrial hyperplasia in subjects who receive continuous norethindrone acetate and ethinyl estradiol combinations versus unopposed ethinyl estradiol.
                Nine hundred forty-five postmenopausal women were randomly selected for 12 months of treatment with one of six blinded norethindrone acetate/ethinyl estradiol combinations (milligrams of norethindrone acetate/micrograms of ethinyl estradiol: 0/5, 0.25/5, 1/5, 0/10, 0.5/10, or 1/10) or to open-label 0.625 mg conjugated equine estrogens/2.5 mg medroxyprogesterone acetate. Endometrial hyperplasia and endometrial proliferation were assessed by biopsy at screening, months 6 and 12.
                Endometrial hyperplasia developed in 26 subjects: Placebo, 0/5 and 0.25/5 (1 subject each) and 0/10 (23 subjects). Significantly less endometrial proliferation was measured in the 1/5 norethindrone acetate/ethinyl estradiol and other norethindrone acetate/ethinyl estradiol combination groups and in the 0.625 mg conjugated equine estrogens/2.5 mg medroxyprogesterone acetate group, than in unopposed ethinyl estradiol groups (6 months: P <.004; 12 months: P <.001). Treatment with 1/5 norethindrone acetate/ethinyl estradiol and with other norethindrone acetate/ethinyl estradiol combinations significantly reduced endometrial proliferation compared with 0.625 mg conjugated equine estrogens/2.5 mg medroxyprogesterone acetate (6 and 12 months: P <.02).
                Norethindrone acetate protects the endometrium from estrogen-induced hyperplasia and changes in proliferative status. In addition, norethindrone acetate/ethinyl estradiol-treated subjects had significantly less endometrial proliferation compared with 0.625 mg conjugated equine estrogens/2.5 mg medroxyprogesterone acetate-treated subjects. This pilot study was conducted to establish the optimum oral dosage of medroxyprogesterone acetate (Provera) given daily in combination with a fixed dose of piperazine oestrone sulphate (Ogen), as hormone replacement therapy. A group of 32 nonhysterectomized, symptomatic menopausal women were randomly allocated to receive piperazine oestrone sulphate 1.25 mg daily and medroxyprogesterone acetate 2.5 mg, 5 mg or 10 mg daily for a 2-year period. This was an open study and the patients were reviewed at 3-monthly intervals for 2 years. Vaginal bleeding was reported by 58% of patients after the first 3 months of treatment. There was a gradual decline in the reported incidence of bleeding over the following 6 months particularly by women in the 5 mg and 10 mg Provera group. Only 10% of patients were still recording slight bleeding in the 10 mg group at 12 months. By 24 months all the women in the 5 mg and 10 mg Provera groups had ceased bleeding. There were 2 patients in the 2.5 mg Provera group with persistent proliferative endometrium at 24 months. All the remaining patients had atrophic endometrium. There was no significant difference in serum lipid changes between the 3 groups, but there was an overall reduction in total cholesterol, triglycerides and low density lipoprotein cholesterol in all women. There was no significant difference in bone mineral density changes between the groups over the 2-year period. Endometrial protection with increased incidence of amenorrhoea, without significant adverse effects, was seen with the use of 5 mg and 10 mg of provera. To investigate the effects of two dosages of conjugated equine estrogen (CEE) in preventing bone loss in early postmenopausal women.
                Two hundreds and thirty six early postmenopausal women were randomly given one of the following regimens for two years. Groups A (GA): CEE 0.625 mg + medroxyprogesterone (MPA domestic made) 2 mg + caltrate-D (Ca-D) 1 tablet daily; Group B (GB): CEE 0.3 mg + MPA 2 mg + Ca-D 1 tablet daily; Group C (GC): Ca-D 1 tablet daily alone. The observation endpoints included: (1) bone mineral density (BMD) of lumbar 2 - 4 (L(2 - 4)) measured by duel energy X-ray absorptiometry (DEXA, Lunar DPX-L) before and 1, 2 years after treatment; (2) vaginal bleeding recorded daily and endometrium thickness yearly by transvaginal ultrasonography. Endometrium biopsies were performed if its thickness greater than 5 mm.
                Two hundreds and thirteen (90%) cases completed 1-year study, 176 (75%) 2 year study. In GA L(2 - 4) BMD significantly increased both after 1 and 2 year treatment as compared with pretreatment value (P < 0.001). While in GB, L(2 - 4) BMD significantly elevated only after 1 year treatment, but did not reach significance during the end of 2 year therapy. In contrast, L(2 - 4) BMD decreased by 0.4% and 1.6% respectively after 1, 2 year of GC although without significance. Compared among the three group, the increments of mean L(2 - 4) BMD after 1 year treatment in GA and GB were significantly different from, that in GC (+2.3%, +2.7% versus -0.4%, P < 0.001, P < 0.05 respectively). So were the values after 2 year treatment (+3.7%, +0.7% versus -1.6%, P < 0.001, P < 0.05 respectively). As compared the mean L(2 - 4) BMD between GA and GB, the difference reached significance only after 2 year (P < 0.01), but not after 1 year treatment (P > 0.05). The vaginal bleeding rate in GA during the first month and 1, 2 year after treatment were higher than those in GB and GC (52% versus 16%, 9%; 43% versus 12%, 2.8%; 34% versus 8%, 3.3%). Endometrium biopsies were carried in 153 cases (27 had endometrium thicker than 5 mm) in GA and GB. No atypical hyperplasia was found, but 2 cases showed simple hyperplasia in the GA. One case in GA developed superficial thromphlebitis during the 1 year treatment.
                Both 0.625 mg and 0.3 mg daily of CEE continuously combined with domestic MPA are effective in preventing postmenopausal osteoporosis. The former has more stronger effect than the latter, but needs higher dose of MPA when combined continuously in order to decrease the vaginal bleeding rate and preventing endometrium hyperplasia. Treatment with unopposed estrogen is known to increase the risk of endometrial hyperplasia, atypia, and carcinoma, and therefore the administration of a progestin during hormone replacement therapy (HRT) is recommended. The addition of a progestin may cause unwanted side effects. Progestin administration of various durations are therefore used in HRT.
                Data were obtained about endometrial histopathology, bleeding interval and compliance in 240 early postmenopausal women receiving HRT with a progestin administered for 10 days during 12 week or 4 week cycles of estrogen administration. These regimens were studied for as long as 4 years. The daily estrogen given was 17beta-estradiol 2 mg per day which was reduced to 1 mg day during the last 6 days of each cycle. The progestin used was norethindrone acetate, given at a dose of 1 mg per day.
                The incidence of endometrial hyperplastic changes, i.e. simple or complex hyperplasia, atypia or cancer, was significantly higher in the 12 weeks cycle than in the monthly cycle group (P = 0.003), with an overall annual incidence of 5.6% in the 12 weeks cycle group and 1% in the monthly cycle group. One case of atypical hyperplasia and one case of endometrial adenocarcinoma was observed in the long cycle group. Long cycle treatment produced more irregular bleeding pattern. Accordingly, the rate of drop-out due to bleeding was significantly higher in the long cycle group (P<0.01).
                We conclude that the long cycle HRT modality investigated did not improve compliance and may increase the risk of endometrial hyperplasia and eventually cancer compared to conventional HRT with a monthly cycle. Caution using long cycle HRT regimens is advisable, and careful monitoring of the endometrium during treatment is recommended. To compare the efficacy and tolerability of a novel oral constant estrogen plus intermittent progestogen hormone replacement therapy (HRT) regimen to a continuous combined HRT regimen in postmenopausal women.
                Subjects were randomly assigned to receive treatment with either constant 17beta-estradiol (E2), 1 mg, plus intermittent norgestimate (NGM) 90 microg (3 days off, 3 days on) (n=221) or E2 2 mg/norethisterone acetate (NETA) 1 mg (n=217) for 1 year. Treatments were evaluated based on the incidence of hot flushes and uterine bleeding.
                Both regimens had similar bleeding profiles and provided comparable vasomotor symptom relief. However, breast discomfort and edema were experienced by twice as many subjects who received E2/NETA.
                The constant E2/intermittent NGM regimen was well tolerated and possesses similar efficacy compared with a continuous combined E2/NETA regimen and may be considered whenever HRT without withdrawal bleeding is deemed appropriate. To evaluate the effect of 1- or 3-monthly sequential combinations of estradiol valerate (E2V) and medroxyprogesterone acetate (MPA) on menopausal symptoms, bone density, muscle strength and lipid metabolism in postmenopausal women.
                Changes in bone mineral density (BMD), isometric muscle strength, serum lipids and climacteric symptoms were evaluated in 78 women, 49-55 years of age, with a spontaneous menopause 0.5-3 years earlier. Treatment group I received 2 mg E2V tablets for 11 days, followed by 2 mg E2V + 10 mg MPA for 10 days and placebo for an additional 7 days; treatment group II received 2 mg E2V for 70 days, 2 mg E2V + 20 mg MPA for 14 days, and placebo for 7 days. The placebo group received placebo continuously for 24 months. Each group was further randomised to exercise and non-exercise subgroups.
                Both hormone regimens significantly reduced menopausal symptoms, and prevented equally well the decrease of BMD both in the lumbar spine and proximal femur. A positive effect of exercise on BMD was observed in the placebo group. No synergistic effect of exercise and estrogen on BMD could be shown. Both hormone regimens increased the isometric strength of back extensor muscles. Serum total and LDL cholesterol decreased during the first year with both estrogen regimens.
                Estrogen-progestin regimens were equally effective in the control of menopausal symptoms and preventing bone loss, increasing muscle strength and lowering serum cholesterol. This double-blind, randomized, multi-center study compared the efficacy and clinical tolerance of a combined formulation containing 2 mg estradiol (E2) and 0.5 mg trimegestone (TMG) with a standard hormone replacement therapy containing estradiol valerate (E2V) and norgestrel (NG) in the treatment of climacteric symptoms. The study was conducted over 13 cycles, each of 28 days, and involved 634 subjects, of whom 481 completed the study. The primary efficacy variable was the percentage of subjects who showed at least a 50% reduction from baseline in the mean daily number of hot flushes in cycle 3. This was observed in 98.5% of the subjects in the E2 + TMG group and 93.3% of the subjects in the E2V + NG group (95% confidence interval of the difference, -8.6, -1.9). Significant differences in favor of the E2 + TMG combination were observed in the reduction in the mean daily number and severity of hot flushes, and in the percentage of subjects who had hot flushes at baseline but no hot flushes during treatment. There were no significant differences between the treatments in the Kupperman index and in urogenital signs or symptoms. Treatment with the E2 + TMG combination was well tolerated and the incidences of adverse events were similar in the two treatment groups. Breast pain was the main adverse event, possibly related to treatment that resulted in discontinuation. The mean number of bleeding days per cycle was significantly lower with the E2 + TMG combination than with the E2V + NG combination. The incidences of endometrial hyperplasia were low and comparable in both treatment groups. It was concluded that the E2 + TMG combination was either equivalent or superior to the E2V + NG combination in the treatment of hot flushes and other climacteric symptoms, and that its bleeding profile was favorable. To study progestin administration at less than monthly intervals in postmenopausal women given continuous estrogen replacement.
                Eighty postmenopausal women received 0.625 mg/day of conjugated equine estrogens for 48 weeks. Using a double-masked design, the subjects were randomized to medroxyprogesterone acetate 10 mg/day for 14 days every 28 or 84 days, or the same dosage for 28 of 84 days. Bleeding patterns, endometrial histology, and serum lipids were assessed.
                The total days of bleeding during the 48-week study were significantly reduced (P < .05) in the women given the progestin for 14 days every 3 months (mean +/- standard deviation 29 +/- 16 days) than with the other two regimens. In all groups, secretory endometrium was reported in 17-39%. At 24 but not 48 weeks, simple hyperplasia was observed in one subject in each of the less than monthly progestin groups. Significant increases (P < .05) of high-density lipoprotein cholesterol were observed before but not after medroxyprogesterone acetate in the women receiving it less than monthly. No change was seen with monthly progestin.
                In this direct comparison, medroxyprogesterone acetate given for 14 days every 3 months elicited less vaginal bleeding than standard monthly administration. Only a single woman had simple hyperplasia with each regimen of progestin given every 84 days. Medroxyprogesterone acetate given for 14 days every 3 months represents a possible alternative to standard monthly therapy if coupled with regular assessment of the endometrium. Estrogen therapy is known to prevent osteoporosis, but studies have shown that conventional doses increase adverse events. Whether lower doses, one quarter of standard treatment, prevent bone loss is not known.
                To examine the effect of 3 years of treatment with 0.25 mg/d of micronized 17beta-estradiol on bone mineral density (BMD) and bone turnover in healthy older postmenopausal women.
                Randomized, double-blind, placebo-controlled trial conducted from July 24, 1998, through June 14, 2002, at a university general clinical research center in the United States. Healthy, community-dwelling women (N = 167) who were older than 65 years at enrollment.
                Dosage of 0.25 mg/d of micronized 17beta-estradiol (n = 83) or placebo (n = 84); all women who had not had a hysterectomy received 100 mg/d of oral micronized progesterone for 2-week periods every 6 months.
                The BMD of the hip, spine, wrist, and total body measured annually for 3 years. Serum and urine biochemical markers of bone resorption and formation and sex hormones were measured at baseline, 3 months, and during years 1 and 3 of treatment.
                Mean BMD increased at all sites for participants taking low-dose estrogen (17beta-estradiol) compared with placebo (P<.001). Compared with participants receiving placebo, participants taking low-dose estrogen had BMD increases of 2.6% for the femoral neck; 3.6%, total hip; 2.8%, spine; and 1.2%, total body. Markers of bone turnover, N-telopeptides of type 1 collagen, and bone alkaline phosphatase decreased significantly (P<.001) in participants taking low-dose estrogen compared with placebo. Estradiol, estrone, and sex hormone-binding globulin levels increased in the estrogen-treated group compared with placebo. The adverse effect profile was similar; specifically, there were no statistically significant differences in breast tenderness, changes in endometrial thickness or pathological effects, or annual mammographic results between the 2 groups. The number of abnormal mammograms over 3 years was 15 for the low-dose estrogen group and 10 for the placebo group (8 occurred at baseline) (P =.26). There were no reports of breast cancer during the study.
                In older women, a dosage of 0.25 mg/d of 17beta-estradiol increased bone density of the hip, spine, and total body, and reduced bone turnover, with minimal adverse effects. Future studies evaluating the effect of low-dose estrogen on fractures are indicated. Two randomized comparative multicenter studies were conducted to establish the endometrial safety and tolerability of a triphasic sequential hormone replacement estradiol valerate/medroxyprogesterone acetate (E2V/MPA) therapy regimen.
                Study 1 was a randomized, double-blind, clinical phase III study in 399 postmenopausal women, following parallel-group design with two groups. The duration of study treatment was 12 or 13 cycles of 28 days. A double-dummy technique was used to ensure blinding in the study. The investigational drugs were E2V/MPA triphasic and E2V/MPA biphasic (Diviseq and Divina, respectively; Orion Pharma). In study 2, a total of 341 subjects were randomly allocated by computer into two parallel groups receiving either E2V/MPA or estradiol/norethisterone acetate triphasic (E2/NETA, Trisequens; Novo Nordisk A/S) for 12-13 cycles. The study was an open, clinical phase III trial with a randomized, parallel-group design. Endometrial biopsies combined with transvaginal ultrasound were undertaken before and at the end of treatment during the progestogen phase. Bleeding patterns and symptom control were assessed throughout both studies.
                E2V/MPA triphasic was found to have similar endometrial effects and bleeding patterns to those with E2V/MPA biphasic and E2/NETA triphasic. Climacteric symptoms were relieved as quickly and effectively as with the two comparator treatments. No adverse drug reactions specific to E2V/MPA triphasic were observed. At the end of the study, the proportions of secretory samples were 67.1% for the combined E2V/MPA triphasic groups, 65.6% for the E2V/MPA biphasic group and 71.6% for the E2/NETA triphasic group. One case of hyperplasia occurred in the E2V/MPA triphasic group. Thus the incidence of hyperplasia for the combined groups was 0.33%.
                The triphasic E2V/MPA regimen was well tolerated and produced endometrial effects similar to those of the two comparators. Extending estrogen during the so-called treatment-free week with a lower dose of estradiol was effective in controlling vasomotor symptoms. We evaluated four oral combinations of conjugated estrogens (Premarin) and medroxyprogesterone acetate in preventing endometrial hyperplasia, which can occur with conjugated estrogens alone.
                This was a 1-year prospective, double-blind, randomized, multicenter study in 1724 postmenopausal women. All five groups took conjugated estrogens (0.625 mg) daily. The respective medroxyprogesterone acetate dosages were 2.5 and 5.0 mg daily (groups A and B) and 5.0 and 10.0 mg for 14 days per 28-day cycle (groups C and D).
                Among the 1385 patients with valid biopsy data, endometrial hyperplasia developed in 20% in the conjugated estrogens-treated group and < or = 1% in each of the four conjugated estrogens/medroxyprogesterone acetate-treated groups. The incidence of endometrial hyperplasia did not differ significantly between any of the conjugated estrogens/medroxyprogesterone acetate regimens. However, none of the patients receiving the two higher medroxyprogesterone acetate dosages (groups B and D) had endometrial hyperplasia.
                The endometrial hyperplasia incidence was significantly lower in women treated with conjugated estrogens and medroxyprogesterone acetate than in women treated with conjugated estrogens alone. We compared two different continuous combined hormone replacement therapy (HRT) regimens of estradiol valerate (E(2)V) and medroxyprogesterone acetate (MPA) with a combination of micronized estradiol (E(2)) and norethisterone acetate (NETA) to determine bleeding pattern, control of climacteric symptoms, lipid profile, endometrial and general safety in a 1-year multicenter study.
                440 postmenopausal women were randomized to three treatment groups to receive: 1 mg E(2)V+2.5 mg MPA; 1 mg E(2)V+5 mg MPA; or 2 mg of E(2)+1 mg NETA. After the first 6 months, the E(2)V dose was increased to 2 mg in both E(2)V/MPA groups. Information on bleeding was recorded on diaries by the women and intensity of climacteric symptoms was assessed using VAS scales. Physical and laboratory examinations, endometrial biopsy and vaginal ultrasonography were performed at baseline and follow-up visits.
                Significantly fewer bleeding days were experienced in the first 3 months by women taking E(2)V/MPA compared with women taking E(2)/NETA. When the dose of E(2)V was increased in the E(2)V/MPA groups, an increase in maximum bleeding intensity was observed in the group receiving 2.5 mg of MPA, but not in the group taking 5 mg of MPA. All dose combinations effectively relieved climacteric symptoms and beneficial effects on the lipid profile were seen after 6 months in all groups. Tolerability and endometrial safety were good and no cases of hyperplasia were observed. More women discontinued treatment prematurely in the E(2)/NETA group compared with either of the E(2)V/MPA groups. The overall continuation rates ranged from 70 to 86%.
                These results confirm that lower dose combinations of continuous combined HRT are usually sufficient to control symptoms or avoid breakthrough bleeding. However, if higher E(2)V dose is needed for symptom control, it should be combined with the higher dose of progestin (5 mg) to avoid bleeding disturbances. Flexible treatment regimens should be available for individualized HRT. The purpose of this multicenter, double-blind, randomized, parallel-group study was to determine the effect of thirteen 28-day cycles of drospirenone combined with estradiol, compared with estradiol alone, on the endometrium of postmenopausal women.
                Postmenopausal women not on hormone therapy but with an intact uterus were enrolled (N = 1,147); 1,142 were evaluated. Participants were randomly assigned to treatment with 1.0 mg of estradiol alone (E(2) monotherapy) or 1.0 mg of estradiol plus 0.5, 1.0, 2.0, or 3.0 mg of drospirenone (DRSP/E(2)). Endometrial biopsies were performed at baseline, at 7 months if indicated, and at study end in the 13th month. Safety was evaluated with peripheral blood samples for hematology, liver and renal function, and lipids, along with vital signs and interval medical evaluations.
                When compared with estradiol alone, combinations of drospirenone and estradiol were effective in protecting against endometrial hyperplasia. The probability of hyperplasia was 0.060 (95% CI, 0.043-0.078) for the E(2) monotherapy group, 0.007 for the 2-mg DRSP/E(2) group, and nonsignificant for the remaining drospirenone/estradiol groups. Endometrial bleeding decreased in all treatment groups over time. The combination of drospirenone and E(2) relieved menopausal symptoms and resulted in improvements in health-related quality-of-life measures. There were no significant adverse events, and effects on triglycerides, total cholesterol, and high-density lipoprotein cholesterol were positive.
                The use of drospirenone combined with estradiol provides protection against endometrial hyperplasia, reduces endometrial bleeding with time, and relieves menopausal symptoms. There were no safety issues and blood pressure was reduced in women with hypertension. To determine bleeding patterns and endometrial response in postmenopausal women taking low-dose (1 mg) estradiol in a sequential combined formulation with 5 or 10 mg dydrogesterone.
                A total of 151 postmenopausal women were allocated randomly to 5 or 10 mg dydrogesterone during cycle days 15-28 in a sequential oral formulation with 1 mg estradiol continuously during 13 cycles of 28 days. Occurrence of vaginal bleeding was recorded daily and analyzed in accordance with World Health Organization (WHO) standards. Endometrial biopsies, obtained at baseline and cycle days 25-27 of the final treatment cycle, were interpreted independently by two pathologists.
                The study was completed by 131 women (87%). The percentage of women with bleeding (mean +/- SD) was 57.2 +/- 3.6% in the 1/5-mg group and 65.8 +/- 4.2% in the 1/10-mg group (p < 0.001); cross-sectional analysis showed that, in every cycle, there were more women with bleeding in the 1/10-than in the 1/5-mg group (p < 0.001). With regard to the day of onset of bleeding, the mean difference between groups was 1.4 +/- 1.1 days (p < 0.001). There was no difference in duration of bleed (5 days), or intensity or incidence of intermittent bleeding (3-14% per cycle). Both regimens resulted in high rates of amenorrhea in each cycle (26-49%), but only 14/151 (9%) women were amenorrheic throughout. Three patients (2%) discontinued owing to bleeding problems. Endometrial protection was adequate in 98.3% (1/5-mg group) and 98.5% (1/10-mg group) with only one case of proliferation (1/10-mg group) and one of simple hyperplasia (1/5-mg group).
                The bleeding pattern associated with low-dose (1 mg) estradiol sequentially combined with 5 or 10 mg dydrogesterone shows a high rate of amenorrhea in each cycle; there is a dydrogesterone dose effect on the occurrence and day of onset of bleeding. Bleeding episodes that occur show a regular pattern and are of slight intensity. The endometrial safety of both regimens is high. The endometrial response to oral, cyclic conjugated equine estrogens with and without the randomized addition of medroxyprogesterone acetate was evaluated in 95 postmenopausal women with respect to morphology and bleeding patterns. At 1 year, therapy with 0.625 mg conjugated equine estrogens or 1.25 mg conjugated equine estrogens for 25 days of a 30-day cycle and 5 mg medroxyprogesterone acetate added to the last 11 days of the conjugated equine estrogens cycle was associated with hyperplasia in 0 and 10% of the patients, respectively (P = not significant). Hyperplasia developed in 30 and 57% of the patients who received the above conjugated equine estrogens and placebo regimens, respectively. Irregular, breakthrough bleeding occurred in 14% of the conjugated equine estrogens/medroxyprogesterone acetate users and in 54% of the conjugated equine estrogens/placebo users. The results of this study indicate that 1 year of therapy with 0.625 mg conjugated equine estrogens and 5 mg medroxyprogesterone acetate provided the most satisfactory endometrial protection against hyperplasia and was associated with relatively low rates of breakthrough bleeding. To compare the bleeding profiles and endometrial protection of two sequential regimens of 17beta-estradiol (17beta-E2) and trimegestone (TMG) with a sequential estradiol valerate (E2V)/norethisterone (NET) regimen.
                This was a randomized, double-blind, multicenter study conducted in eight countries in healthy, postmenopausal women with an intact uterus. A total of 1218 women were enrolled into the initial 1-year study (13 cycles), and subsequently 531 of these received treatment for a further year (26 cycles). Treatment regimens were 1 mg 17beta-E2 on days 1-14 and 1 mg 17beta-E2/0.125 mg TMG or 1 mg 17beta-E2/0.25 mg TMG on days 15-28, and 1 mg E2V on days 1-16 and 1 mg E2V/1 mg NET on days 17-28.
                Mean percentage of women reporting onset of withdrawal bleeding episodes during the week following discontinuation of progestogen was higher in the 1 mg 17beta-E2/0.25 mg TMG group than in the other two treatments, showing a more efficient progestogen effect on the endometrium and good predictability of bleeding onset with this treatment. The mean numbers and average lengths of bleeding episodes were similar in the three treatment groups. Overall, the bleeding profile was more favorable with 1 mg 17beta-E2/0.25 mg TMG than with the lower-dose TMG preparation. Both of the TMG regimens demonstrated a good protective effect on endometrial proliferation, with the 0.25 mg TMG dose showing a lower incidence of proliferative endometrium.
                The 1 mg 17beta-E2/0.25 mg TMG regimen showed an adequate protection of the endometrium, with an overall favorable bleeding profile. To compare the effects of frequently used two different regimens of combined continuous hormone replacement therapy; 0.625 mg conjugated equine estrogen (CEE) + 2.5 mg medroxyprogesterone acetate (MPA) and 1 mg 17beta estradiol (E2) + 0.5 mg norethindrone acetate (NETA), on endometrial histopathology and postmenopausal uterine bleeding.
                Two hundred and forty-six outpatient subjects aged 41-57 years were enrolled in the study conducted at the menopause clinic between November 2003 and November 2004. One hundred and thirty-nine patients were assigned to receive 0.625 mg conjugated equine estrogen + 2.5 mg medroxyprogesterone acetate (CEE/MPA), whereas 107 patients were to receive 17beta estradiol + 0.5 mg norethindrone acetate (E2/NETA). Inclusion criteria of the study were: normal values of endometrial thickness at basal evaluation, women with intact uterus, at least 12 months of amenorrhea, normal vaginal smear, bilateral mammography and biochemical blood parameters. All women were questioned every 3 months for vaginal bleeding/spotting. Endometrial sampling was performed by Pipelle catheter in the 12th month of therapy.
                For the first 3 months, vaginal bleeding/spotting rate for the CEE/MPA group was 38.7%, whereas it was higher (45%) in the E2/NETA group. For the second 3-month period, vaginal bleeding/spotting frequencies were 41.1 and 37.8%, respectively. In the third 3-month period 30.6 and 29.6%, and in the fourth 3-month period, 18.5 and 12.5% of the patients reported vaginal bleeding or spotting. None of the results of endometrial sampling have shown findings of cancer histopathology.
                Compared to CEE/MPA regimen, E2/NETA therapy has not shown more favorable effects on postmenopausal bleeding abnormalities. Irregular endometrial proliferation was seen more with the E2/NETA regimen. With the use of a double-blind, randomized, dose-ranging design, we tested during an 18-month period the degree of protection against postmenopausal bone loss afforded by micronized 17 beta-estradiol in dosages of 0.5, 1.0, and 2.0 mg. All subjects received supplementation to ensure a minimum of 1500 mg calcium daily. Fifty-one subjects completed at least 1 year of follow-up bone density measurements by quantitative computed tomography and by single- and dual-photon absorptiometry. In the placebo group spinal trabecular bone density decreased 4.9% annually (p less than 0.001), whereas in those taking micronized 17 beta-estradiol bone density tended to increase (annual increases of 0.3% in the 0.5 mg micronized 17 beta-estradiol group, 1.8% in the 1.0 mg micronized 17 beta-estradiol group, and 2.5% in the 2.0 mg micronized 17 beta-estradiol group). After completing the double-blind phase, 41 subjects completed an additional 18 months of follow-up while taking 1.0 mg micronized 17 beta-estradiol. During this time one third of the subjects were randomly assigned to discontinue calcium supplements. Among those who previously received placebo, trabecular bone density increased 4.3% annually, whereas among those who had used micronized 17 beta-estradiol, trabecular bone density response was inversely related to the dosage previously used. Additionally and independently, the level of calcium intake showed a statistically significant correlation with the change in spinal trabecular bone density (r = 0.37, p = 0.02). We conclude that micronized 17 beta-estradiol has a continuous skeletal dose-response effect in the range of 0.5 to 2.0 mg and that calcium intake positively modifies the skeletal response to 1.0 mg micronized 17 beta-estradiol. Despite decades of accumulated observational evidence, the balance of risks and benefits for hormone use in healthy postmenopausal women remains uncertain.
                To assess the major health benefits and risks of the most commonly used combined hormone preparation in the United States.
                Estrogen plus progestin component of the Women's Health Initiative, a randomized controlled primary prevention trial (planned duration, 8.5 years) in which 16608 postmenopausal women aged 50-79 years with an intact uterus at baseline were recruited by 40 US clinical centers in 1993-1998.
                Participants received conjugated equine estrogens, 0.625 mg/d, plus medroxyprogesterone acetate, 2.5 mg/d, in 1 tablet (n = 8506) or placebo (n = 8102).
                The primary outcome was coronary heart disease (CHD) (nonfatal myocardial infarction and CHD death), with invasive breast cancer as the primary adverse outcome. A global index summarizing the balance of risks and benefits included the 2 primary outcomes plus stroke, pulmonary embolism (PE), endometrial cancer, colorectal cancer, hip fracture, and death due to other causes.
                On May 31, 2002, after a mean of 5.2 years of follow-up, the data and safety monitoring board recommended stopping the trial of estrogen plus progestin vs placebo because the test statistic for invasive breast cancer exceeded the stopping boundary for this adverse effect and the global index statistic supported risks exceeding benefits. This report includes data on the major clinical outcomes through April 30, 2002. Estimated hazard ratios (HRs) (nominal 95% confidence intervals [CIs]) were as follows: CHD, 1.29 (1.02-1.63) with 286 cases; breast cancer, 1.26 (1.00-1.59) with 290 cases; stroke, 1.41 (1.07-1.85) with 212 cases; PE, 2.13 (1.39-3.25) with 101 cases; colorectal cancer, 0.63 (0.43-0.92) with 112 cases; endometrial cancer, 0.83 (0.47-1.47) with 47 cases; hip fracture, 0.66 (0.45-0.98) with 106 cases; and death due to other causes, 0.92 (0.74-1.14) with 331 cases. Corresponding HRs (nominal 95% CIs) for composite outcomes were 1.22 (1.09-1.36) for total cardiovascular disease (arterial and venous disease), 1.03 (0.90-1.17) for total cancer, 0.76 (0.69-0.85) for combined fractures, 0.98 (0.82-1.18) for total mortality, and 1.15 (1.03-1.28) for the global index. Absolute excess risks per 10 000 person-years attributable to estrogen plus progestin were 7 more CHD events, 8 more strokes, 8 more PEs, and 8 more invasive breast cancers, while absolute risk reductions per 10 000 person-years were 6 fewer colorectal cancers and 5 fewer hip fractures. The absolute excess risk of events included in the global index was 19 per 10 000 person-years.
                Overall health risks exceeded benefits from use of combined estrogen plus progestin for an average 5.2-year follow-up among healthy postmenopausal US women. All-cause mortality was not affected during the trial. The risk-benefit profile found in this trial is not consistent with the requirements for a viable intervention for primary prevention of chronic diseases, and the results indicate that this regimen should not be initiated or continued for primary prevention of CHD.
Hormone therapy for postmenopausal women with an intact uterus should comprise both estrogen and progestogen to reduce the risk of endometrial hyperplasia.