For most comparisons , the credibility of evidence was rated very low to moderate , with the exception for the DASH vs. the low-fat dietary approach for which the quality of evidence was rated high .
Conclusion : The present network meta- analysis suggests that the DASH dietary approach might be the most effective dietary measure to reduce blood pressure among hypertensive and pre-hypertensive patients based on high quality evidence
ABSTRACT Background : Pairwise meta-analyses have shown beneficial effects of individual dietary approaches on blood pressure but their comparative effects have not been established .
Objective : Therefore we performed a systematic review of different dietary intervention trials and estimated the aggregate blood pressure effects through network meta- analysis including hypertensive and pre-hypertensive patients .
Dietary approach to hypertension based on low glycaemic index and principles of DASH (Dietary Approaches to Stop Hypertension): a randomised trial in a primary care service.
Hypertension is one of the leading causes of morbidity and mortality in Brazil .  Diet may play an important role in reducing blood pressure ( BP ) , as has been shown for diets high in fruits , vegetables and low-fat dairy products and low in salt ( Dietary Approaches to Stop Hypertension (DASH)-Na ) . A low-glycaemic index Brazilian diet combined with the principles of the DASH-Na diet was evaluated in a r and omised study of 206 individuals who were followed for 6 months . In the control group ( CG ) , counselling was based on st and ard care and mainly focused on salt intake reduction . An intention-to-treat analysis showed that , after 6 months , systolic BP was reduced by 14·4 mmHg and diastolic BP by 9·7 mmHg in the experimental group ( EG ) , compared with 6·7 and 4·6 mmHg , respectively , in the CG . After adjusting for body weight , BP at baseline and age , these changes were 12·1 and 7·9 mmHg , respectively . Urinary Na excretion was also reduced by 43·4 mEq/24 h in the EG . Food intake was modified accordingly during the intervention with an increase in the consumption of vegetables  ( 2·97 - 5·85 frequency of consumption measured in three non-consecutive days ) , fruits ( 4·09 - 7·18 ) , beans ( 1·94 - 3·13 ) and fish ( 1·80 - 2·74 ) by the EG . The present study showed the feasibility of a Brazilian dietary approach to treating hypertension by reducing urinary Na excretion and BP , changes that may have a great impact on public health and promote the benefits of controlling hypertension
For most comparisons , the credibility of evidence was rated very low to moderate , with the exception for the DASH vs. the low-fat dietary approach for which the quality of evidence was rated high .
Conclusion : The present network meta- analysis suggests that the DASH dietary approach might be the most effective dietary measure to reduce blood pressure among hypertensive and pre-hypertensive patients based on high quality evidence
ABSTRACT Background : Pairwise meta-analyses have shown beneficial effects of individual dietary approaches on blood pressure but their comparative effects have not been established .
Objective : Therefore we performed a systematic review of different dietary intervention trials and estimated the aggregate blood pressure effects through network meta- analysis including hypertensive and pre-hypertensive patients .