PMID: 11900496Mar 20, 2002Paper

J-shaped relationship between blood pressure and mortality in hypertensive patients: new insights from a meta-analysis of individual-patient data

Annals of Internal Medicine
Florent BoutitieINDANA Project Steering Committee. INdividual Data ANalysis of Antihypertensive intervention

Abstract

Population-based longitudinal studies of hypertension have usually shown a continuous and positive relationship between blood pressure and mortality. However, several studies in hypertensive patients receiving treatment have described this relationship as J-shaped, with an increased risk for events in patients with low blood pressure. To assess the evidence for a J-shaped relationship between blood pressure and mortality and its relation to treatment. Meta-analysis of individual-patient data. Seven randomized clinical trials from the INDANA (INdividual Data ANalysis of Antihypertensive intervention) database. 40 233 persons with hypertension (mean follow-up, 3.9 years). Primarily beta-blockers or thiazide diuretics versus placebo or no treatment. Diastolic and systolic blood pressure and number of cardiovascular, noncardiovascular, and all-cause deaths in yearly periods of follow-up. The analysis included data on 1655 deaths (56% cardiovascular). A J-shaped relationship between diastolic blood pressure and risk for death was observed for total and cardiovascular mortality in treated patients (nadir, 84 and 80 mm Hg, respectively) and untreated patients (nadir, 90 and 85 mm Hg, respectively). For noncardiovascular deaths, the re...Continue Reading

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