A small body of evidence suggested, but did not confirm, that HBPM could serve as a similar predictor of outcomes.S4.2-4 Meta-analyses of RCTs have identified clinically useful reductions in SBP and DBP and achievement of BP goals at 6 months and 1 year when self-monitoring of BP has been used in con- junction with other interventions, compared with usual care. Meta-analyses of RCTs have identified only small Table 9. Selection Criteria for BP Cuff Size for Measurement of BP in Adults Arm Circumference Usual Cuff Size 22 26 cm Small adult 27 34 cm Adult 35 44 cm Large adult 45 52 cm Adult thigh Adapted with permission from Pickering et alS4.1-2 (American Heart Association, Inc.). BP indicates blood pressure. Whelton et al 2017 High Blood Pressure Clinical Practice Guideline e25 net reductions in SBP and DBP at 6 months and 1 year for use of self-monitoring of BP on its own, as compared with usual care.S4.2-1,S4.2-5,S4.2-6 See Section 4.4 for addi- tional details of diagnostic classification and Section 12 for additional details of telehealth and out-of-office BP measurement for management of high BP. 4.3. Ambulatory BP Monitoring All of the major RCTs have been based on use of clinic BP readings. However, ABPM is often used to supplement BP readings obtained in office settings.S4.3-1 The monitors are usually programmed to obtain readings every 15 to 30 min- utes throughout the day and every 15 minutes to 1 hour during the night. ABPM is conducted while individuals go about their normal daily activities. 