Key result
Systolic BP control rates varied substantially by measurement method (28% clinic, 47% home, 68% research), and averaging 5 to 6 measurements greatly reduced within-patient variability.
Why the study?
Do different blood pressure measurement strategies (home, clinic, research) affect the classification of BP control in veterans with hypertension?
Population
444 veterans with hypertension, mostly men with a long-standing history of hypertension and previous poor BP…
Comparison
Home blood pressure measurements and… vs Routine clinic blood pressure measurements…
Design
Cohort
Follow-up
18 months
Authors
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Clinic BP readings often misclassify control in veterans; leaves open whether averaged home or research protocols improve risk stratification.
RCT (n=444)
Yes
Do different blood pressure measurement strategies (home, clinic, research) affect the classification of BP control in veterans with hypertension?
Averaging 5 to 6 blood pressure measurements is necessary to classify patients' BP control with 80% certainty, as single clinic measurements often misclassify control status.
Powers et al. (2011) conducted an RCT in hypertension (n=444). Blood pressure measurement strategies (research, clinic, home) was evaluated on Classification of patients as having BP in or out of control. Systolic BP control rates varied substantially by measurement method (28% clinic, 47% home, 68% research), and averaging 5 to 6 measurements greatly reduced within-patient variability.
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