When there were enough studies on BP outcomes, subgroup and meta-regression analyses were conducted to investigate the differential effects of the modified DASH diet on hypertension and to explore heterogeneity. Sensitivity analysis was performed to analyze the stability of the results by sequentially omitting one study. A fixed-effects model was used when there was no significant heterogeneity otherwise, the random-effects model was used. Systolic BP (SBP) or diastolic BP (DBP) increased by 20/10 mmHg will increase the risk of cardiovascular diseases by two times ( 4, 5). Hypertension, a primary risk factor for cardiovascular disease, is the leading cause of premature death worldwide and accounts for ~12.8% of global deaths ( 1– 3). Systematic Review Registration: PROSPERO registration number: CRD42020190860. A higher baseline BP is associated with more marked systolic and diastolic BP reduction. The modified DASH diet could affect mean waist circumference (difference: 1.57 cm 95% confidence interval −2.98, −0.15) and triglyceride concentration (difference: 1.04 mol/L 95% confidence interval −1.47, −0.60).Ĭonclusions: The modified DASH diet can reduce BP, waist circumference, and triglyceride concentration in hypertension patients. Compared with the controlling diet, the modified DASH diet could reduce systolic BP to a greater extent in trials with a mean baseline BP ≥ 140/90 mmHg compared with 8 weeks compared with ≤8 weeks. Compared with control diet, the modified DASH diet could reduce mean systolic (−3.26 mmHg 95% confidence interval −5.58, −0.94 mmHg P = 0.006) and diastolic (−2.07 mmHg 95% confidence interval −3.68, −0.46 mmHg P = 0.01) BP. Results: A total of 10 RCTs were included. Risk of bias was assessed with the Cochrane tool and quality of evidence with GRADE. Statistical analysis was performed using Stata software. Randomized controlled trials (RCTs) assessing the effects of the modified DASH diet on systolic and diastolic BP, cardiovascular risk factors (body weight, body mass index, waist circumference, fasting glucose, blood lipids), cardiovascular events, and all-cause mortality were included. Methods: We searched Medline, Embase, CENTRAL, CNKI, VIP, Wanfang Data, SINOMED, Google Scholar, the World Health Organization's International Clinical Trials Registry Platform, and from inception to July 1st, 2021. The study was designed to assess the effects of the modified DASH diet on blood pressure (BP) in hypertensive and pre-hypertensive adults. The evidence for the effect of the modified DASH diet on blood pressure reduction was inconsistent. 5Chinese Evidence-Based Medicine Center, West China Hospital, Sichuan University, Chengdu, Chinaīackground: The modified Dietary Approaches to Stop Hypertension (DASH) diet was a potentially effective treatment for pre-hypertensive and hypertensive patients.4Department of Periodical Press and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China.3Department of Anesthesiology and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and The Research Units of West China, Chinese Academy of Medical Sciences, Chengdu, China.2Department of Medical Administration, West China Hospital, Sichuan University, Chengdu, China.1International Medical Center/Department of General Practice and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China.Ru Guo 1 † Nian Li 2 † Rong Yang 1 Xiao-Yang Liao 1 Yu Zhang 1 Ben-Fu Zhu 1 Qian Zhao 1 Lingmin Chen 3 Yong-Gang Zhang 4,5 * Yi Lei 1 *
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