![]() ![]() 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 Pro-Health clinical research unit, and 2 in cardiology clinics). A Johns Hopkins University School of Medicine institutional review board approved this study. ![]()
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