![]() 3įor IBP measurements, research staff were trained to measure BP according to manufacturer guidelines using the IBP app, version 1.2.3, on a smartphone (iPhone 5s and 6 iOS version 8.3 Apple Inc) IBP required entry of date of birth, sex, height, and weight for each measurement. ![]() Per prespecified dropping rules, data from 16 individuals were discarded because of unavailable cuff sizes (n = 1), standard device errors (n = 2), and excessive variation in sequential standard BP measurements, greater than 12 mm Hg for systolic BP or greater than 8 mm Hg for diastolic BP (n = 13). Participants were given $5 gift cards for their time. After prescreening 105 individuals, written informed consent was obtained from 101 participants. Clinicians referred patients with or without hypertension or a baseline hypertensive reading for enrollment. In August and September 2015, we enrolled patients and staff who were at least 18 years old from 5 ambulatory Johns Hopkins sites (1 clinic each in general internal medicine, nephrology, and the ProHealth clinical research unit, and 2 in cardiology clinics).
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