Participant characteristics and the differences between the intervention- and control arm.
obesity, weight gain
OBESITY
* Statistically significant difference between control and intervention group: method of conception P = 0.046; gestational weight gain in kg P = 0.035; QoL at baseline P = 0.038The drop-out rate at the end of intervention was higher in women with pre-pregnancy overweight (32.9%) or obesity (41.6%) compared to women with a normal pre-pregnancy BMI (26.6%) (P = ≤0.001).Despite randomization, there seems to be an imbalance between the intervention- and control arm for method of conception, gestational weight gain in kg and QoL at baseline. More women were more spontaneously pregnant in the control arm (92.1%) compared to the intervention arm (88.4%; P = 0.046). In women with a normal pre-pregnancy BMI, the median GWG was 18kg (IQR 17–20) in the intervention arm compared to 19kg (IQR 17–21) in the control arm(P = 0.035). The median score of QoL at baseline was slightly higher in the control arm (80; IQR 71–85) compared with the intervention arm (78; IQR 70–84) (P = 0.038). No difference was found anymore between intervention- and control arm regarding method of conception, quality of life and GWG in women with a 6 month measurement (n = 720) or 12 month measurement (n = 507). Details are presented in 