The main emphasis is on the importance of obtaining standardized BP measurements that are made ac- cording to recommended preparation procedures (Figure 2). RCTs and prospective cohort studies used standardized of ce BP measured with either oscillometric (in newer studies) or manual devices (in older studies; Figure 310 13 ). Studies that directly compared standardized of ce BP measured using an oscillometric device versus a manual de- vice do not suggest overt differences in readings between these 2 types of devices (Supplementary Table S414 16 ). Moreover, all BP measurement devices are validated and calibrated against mercury sphygmomanometers, so they would be ex- pected to give similar BP readings. Therefore, BP levels from trials that have used different types of standardized of ce BP measurements should, in general, be comparable. The negative aspects of oscillometric BP devices are the potentially higher cost of the device compared with a manual device, the requirement of an electric power source, and lack of availability in some settings. In choosing a device, one that has been validated for accuracy and precision against a mer- cury sphygmomanometer should be selected. Several national medical or hypertension associations have established a vali- dated device listing that has information on oscillometric devices that are suitable for use.17 19 Providers working in areas where oscillometric BP devices are not available may use a manual BP device, but proper calibration of these BP de- vices is required as noted above. Regardless of the type of BP device used, proper prepa- ration and BP measurement techniques are paramount (Figure 2). Practice Point 1.2: Automated of ce BP (AOBP), either attended or unattended, may be the preferred method of standardized of ce BP measurement. 