Adherence to the Healthy Eating Index and Alternative Healthy Eating Index dietary patterns and mortality from all causes, cardiovascular disease and cancer: a meta-analysis of observational studies.

Background: This meta-analysis investigated the association of diet quality indices, as assessed by HEI and AHEI, and the risk of all-cause, cardiovascular and cancer mortality.
Methods: We used PubMed, ISI Web of Science and Google Scholar to search for eligible articles published before July 2015. A total of 12 cohort studies (38 reports) and one cross-sectional study (three reports) met the inclusion criteria and were included in our meta-analysis.
Results: The highest level of adherence to the Healthy Eating Index (HEI) and Alternative Healthy Eating Index (AHEI) was significantly associated with a reduced risk of all-cause mortality [relative risk (RR) = 0.77, 95% confidence intterval (CI) = 0.76-0.78], cardiovascular mortality (RR = 0.77, 95% CI = 0.74-0.80) and cancer mortality (RR = 0.83, 95% CI = 0.81-0.86). Egger regression tests provided no evidence of publication bias.
Conclusions: The present study indicates that high adherence to HEI and AHEI dietary patterns, indicating high diet quality, are associated with reduced risk of all-cause mortality (as well as cardiovascular mortality and cancer mortality).
(© 2016 The British Dietetic Association Ltd.)