White coat hypertension prevalence averages approxi- mately 13% and as high as 35% in some hypertensive and ABPM and HBPM are better predictors of CVD risk due to elevated BP than are of- fice BP measurements, with ABPM being the preferred measurement option. The major clinical relevance of white coat hypertension is that it has typically been as- sociated with a minimal to only slightly increased risk of CVD and all-cause mortality risk.S4.4-3,S4.4-4,S4.4-7,S4.4-11,S4.4-24 If ABPM resources are not readily available, HBPM pro- vides a reasonable but less desirable alternative to screen for white coat hypertension, although the overlap with ABPM is only 60% to 70% for detection of white coat 2. The incidence of white coat hypertension converting to sustained hypertension (justifying the addition of antihy- pertensive drug therapy to lifestyle modification) is 1% to 5% per year byABPM or HBPM, with a higher incidence of conversion in those with elevated BP, older age, obe- sity, or black race.S4.4-2,S4.4-7 3. The overlap between HBPM and both daytime and 24-hour ABPM in diagnosing white coat hyperten- sion is only 60% to 70%, and the data for prediction of CVD risk are stronger with ABPM than with office Because a diagnosis of white coat hypertension may result in a decision not to treat or intensify treatment in patients with elevated office BP readings, confirmation of BP control by ABPM in ad- dition to HBPM provides added support for this decision. 4. In contrast to white coat hypertension, masked hyperten- sion is associated with a CVD and all-cause mortality risk twice as high as that seen in normotensive individuals, with a risk range similar to that of patients with sustained Therefore, out- of-office readings are reasonable to confirm BP control seen with office readings. 5. 