Weight-reducing diets may be beneficial in hypertension

Clinical question: 
How effective are weight-reducing diets in hypertensive patients?
Bottom line: 
In patients with primary hypertension, weight loss diets reduced body weight and blood pressure. A reduction in body weight of approximately 4kg was necessary to achieve a reduction of approximately 4.5mmHg systolic blood pressure and of approximately 3.2mmHg diastolic blood pressure. No useful information on adverse effects was reported in the relevant trials. Mean treatment duration was 6 to 36 months and there was little or no information about deaths or other long-term complications.
Caveat: 
These results are mainly based on 1 large study with about 600 participants that was judged to be of high quality. The magnitude of the effects are uncertain, as a result of the small number of patients and studies that could be included in the analyses.
Context: 
All major guidelines for antihypertensive therapy recommend weight loss. Dietary interventions that aim to reduce body weight may be a useful intervention to reduce blood pressure and the adverse cardiovascular events associated with hypertension.
Review CD#: 
CD008274
PEARLS No: 
341
Date: 
December, 2011
Authored by: 
Brian R McAvoy