Abstract
The authors evaluated differences in the reliability of home blood pressure measurements taken in the morning, before dinner, and at bedtime. Forty-eight patients with hypertension (age range, 50-89 years; mean age, 76.4years) measured their home blood pressure using a validated automatic information/communication technology-based device for 14 consecutive days. Those days were divided into the first seven days (1-7) and the following 8 to 14 days (days 8-14) and compared systolic blood pressure (SBP) reliability in the two periods for each measurement time point. In Bland-Altman analyses, morning SBP showed the least standard error of measurement (3.0mmHg). There were fixed biases in morning and before-dinner SBP with average limits of agreement of 3.9 and 6.4mmHg, respectively. For at-bedtime SBP, a random error was detected and the minimal detectable change was 13.8mmHg. The percentage of near-maximal variation of morning SBP was the smallest at 18.1%. Morning SBP therefore provided the most reliable home blood pressure value in the day.
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Schedule a callMore From: Journal of clinical hypertension (Greenwich, Conn.)
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