At each visit,2 BP measurements separated by at least 30 seconds were obtained.
Systolic BP was the appearance of the first Korotkoff sound, and diastolic BP was the disappearance of Korotkoff sounds. At each assessment point, BP was the mean of all available measurements (baseline [8 BP measurements across 4 visits], 3-month assessment [2 BP measurements at 1 visit], and 6-month assessment [6 BP measurements across 3 visits]).