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Systolic blood pressure control after participation in a hypertension intervention study.

Welch LK, Olson KL, Snow KE, Pointer L, Lambert-Kerzner A, Havranek EP, Magid DJ, Ho PM. Systolic blood pressure control after participation in a hypertension intervention study. The American journal of managed care. 2012 Jan 18; 17(7):473-8.

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Abstract:

OBJECTIVE: To evaluate whether systolic blood pressure (SBP) control is maintained following participation in a multimodal hypertension intervention. STUDY DESIGN: This was a retrospective cohort of patients completing the Improving Blood Pressure in Colorado study, a randomized trial comparing a multimodal intervention with usual care for patients who had uncontrolled hypertension. Chart review assessed the first SBP measurement recorded as part of routine care after the study ended. Among patients who had controlled SBP at the final study visit, the proportions who had uncontrolled SBP during follow-up were compared for the intervention and usual care (UC) groups. Kaplan-Meier estimates assessed time to uncontrolled SBP by treatment arm. RESULTS: Of 283 patients completing the Improving Blood Pressure in Colorado study, 51.5% in the intervention and 46.9% in the UC group had controlled SBP at the final study visit. Of patients with controlled SBP, 37.0% and 46.4% of patients in the intervention and UC groups, respectively, had uncontrolled SBP at their initial measurement during follow-up (P = .32). There was no difference in median time to uncontrolled SBP (126 vs 114 days for the intervention and UC groups, respectively; P = .47). CONCLUSIONS: SBP control was not maintained in a significant proportion of patients in both groups following hypertension study participation. These findings suggest the need for interventions to focus on longer-term BP control in contrast to the short duration of most hypertension intervention trials.





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