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Dietary Inflammatory Index and Cardiovascular Risk and Mortality-A Meta-Analysis.

Dietary Inflammatory Index and Cardiovascular Risk and Mortality-A Meta-Analysis.
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Shivappa N, Godos J, Hébert JR, Wirth MD, Piuri G, Speciani AF, Grosso G,


Shivappa N, Godos J, Hébert JR, Wirth MD, Piuri G, Speciani AF, Grosso G, (click to view)

Shivappa N, Godos J, Hébert JR, Wirth MD, Piuri G, Speciani AF, Grosso G,

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Nutrients 2018 02 1210(2) pii E200
Abstract

Diet and chronic inflammation have been suggested to be risk factors in the development of cardiovascular disease (CVD) and related mortality. The possible link between the inflammatory potential of diet measured through the Dietary Inflammatory Index (DII) and CVD has been investigated in several populations across the world. The aim of this study was to conduct a meta-analysis on studies exploring this association. Data from 14 studies were eligible, of which two were case-control, eleven were cohort, and one was cross-sectional. Results from the random-effects meta-analysis showed a positive association between increasing DII, indicating a pro-inflammatory diet, and CVD. Individuals in the highest versus the lowest (reference) DII category showed a 36% increased risk of CVD incidence and mortality, with moderate evidence of heterogeneity (relative risk (RR) = 1.36, 95% confidence interval (CI): 1.19, 1.57; heterogeneity index² = 69%,< 0.001). When analyzed as a continuous variable, results showed an increased risk of CVD risk and mortality of 8% for each one-point increase in the DII score. Results remained unchanged when analyses were restricted to the prospective studies. Results of our meta-analysis support the importance of adopting a healthier anti-inflammatory diet for preventing CVD incidence and related mortality. In conclusion, a pro-inflammatory diet is associated with increased risk of CVD and CVD mortality. These results further substantiate the utility of DII as tool to characterize the inflammatory potential of diet and to predict CVD incidence and mortality.

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