Journal of hypertension · 2016
Vegetarian diet reduces the risk of hypertension independent of abdominal obesity and inflammation: a prospective study.
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Chuang Shao-Yuan, Chiu Tina H T, Lee Chun-Yi, Liu Ting-Ting, Tsao Chwen Keng, Hsiung Chao A, Chiu Yen-Feng
Аннотация
OBJECTIVES: A vegetarian diet may prevent elevation of blood pressures and lower the risk for hypertension through lower degrees of obesity, inflammation, and insulin resistance. This study investigated the association between a vegetarian diet and hypertension incidence in a cohort of Taiwanese adult nonsmokers and examined whether this association was mediated through inflammation, abdominal obesity, or insulin resistance (using fasting glucose as a proxy).
METHODS: This matched cohort study was from the 1994-2008 MJ Health Screening Database. Each vegetarian was matched with five nonvegetarians by age, sex, and study site. The analysis included 4109 nonsmokers (3423 nonvegetarians and 686 vegetarians), followed for a median of 1.61 years. The outcome includes hypertension incidence, as well as SBP and DBP levels. Regression analysis was performed to assess the association between vegetarian diet and hypertension incidence or future blood pressure levels in the presence/absence of potential mediators.
RESULTS: Vegetarians had a 34% lower risk for hypertension, adjusting for age and sex (odds ratio: 0.66, 95% confidence interval: 0.50-0.87; SBP: -3.3 mmHg, P < 0.001; DBP: -1.5 mmHg, P < 0.001). The results stay statistically significant after further adjustment for C-reactive protein, waist circumference, and fasting glucose (odds ratio: 0.72, 95% confidence interval: 0.55-0.86; SBP: -2.4 mmHg, P < 0.05; DBP: -1.1 mmHg, P < 0.05). The protective association between vegetarian diet and hypertension appeared to be consistent across age groups.
CONCLUSION: Taiwanese vegetarians had lower incidence of hypertension than nonvegetarians. Vegetarian diets may protect against hypertension beyond lower abdominal obesity, inflammation, and insulin resistance.
METHODS: This matched cohort study was from the 1994-2008 MJ Health Screening Database. Each vegetarian was matched with five nonvegetarians by age, sex, and study site. The analysis included 4109 nonsmokers (3423 nonvegetarians and 686 vegetarians), followed for a median of 1.61 years. The outcome includes hypertension incidence, as well as SBP and DBP levels. Regression analysis was performed to assess the association between vegetarian diet and hypertension incidence or future blood pressure levels in the presence/absence of potential mediators.
RESULTS: Vegetarians had a 34% lower risk for hypertension, adjusting for age and sex (odds ratio: 0.66, 95% confidence interval: 0.50-0.87; SBP: -3.3 mmHg, P < 0.001; DBP: -1.5 mmHg, P < 0.001). The results stay statistically significant after further adjustment for C-reactive protein, waist circumference, and fasting glucose (odds ratio: 0.72, 95% confidence interval: 0.55-0.86; SBP: -2.4 mmHg, P < 0.05; DBP: -1.1 mmHg, P < 0.05). The protective association between vegetarian diet and hypertension appeared to be consistent across age groups.
CONCLUSION: Taiwanese vegetarians had lower incidence of hypertension than nonvegetarians. Vegetarian diets may protect against hypertension beyond lower abdominal obesity, inflammation, and insulin resistance.