A Comparison of Home Measurement and Ambulatory Monitoring of Blood Pressure in the Adjustment of Antihypertensive Treatment*

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Abstract

Background:

The purpose of this study was to compare home and ambulatory blood pressure (BP) in the adjustment of antihypertensive treatment.

Methods:

After a 4-week washout period, patients whose untreated daytime diastolic ambulatory BP averaged ≥85 mm Hg were randomized to be treated according to their ambulatory or home BP. Antihypertensive treatment was adjusted at 6-week intervals according to the mean daytime ambulatory diastolic BP or the mean home diastolic BP, depending on the patient's randomization group. If the diastolic BP stayed above 80 mm Hg, the physician blinded to randomization intensified hypertensive treatment.

Results:

Ninety-eight patients completed the study. During the 24-week follow-up period both systolic and diastolic BP decreased significantly within both groups (P < .001). At the end of the study, the systolic/diastolic differences between ambulatory (n = 46) and home (n = 52) BP groups in home, daytime ambulatory, night-time ambulatory, and 24-h ambulatory BP changes averaged 2.6/2.6 mm Hg, 0.6/1.7 mm Hg, 1.0/1.4 mm Hg, and 0.6/1.5 mm Hg, respectively (P range .06 to .75) A nonsignificant trend to more intensive drug therapy in the ambulatory BP group and a nonsignificant trend to larger share of patients reaching (57.7% v 43.5%, P = .16) the target pressure in the home BP group was observed due to the 3.8 mm Hg difference in ambulatory and home diastolic BP at randomization.

Conclusions:

The adjustment of antihypertensive treatment based on either ambulatory or home BP measurement led to good BP control. No significant between-group differences in BP changes were seen at the end of the study. Additional research is needed to provide more conclusive results.

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