Fish Consumption and Risk of All-cause and Cardiovascular Mortality: a Dose-response Meta-analysis of Prospective Observational Studies

Overview

Journal Public Health Nutr

Publisher Cambridge University Press

Date 2018 Jan 11

PMID 29317009

Citations 39

Authors

Ahmad Jayedi

Sakineh Shab-Bidar

Saragol Eimeri

Kurosh Djafarian

Affiliations

Soon will be listed here.

Abstract

Objective: There are some indications of regional differences in the association between fish consumption and clinical outcomes. We aimed to test the linear and potential non-linear dose-response relationships between fish consumption and risk of all-cause and cardiovascular (CVD) mortality, and possible confounding by region.

Design: Systematic review and dose-response meta-analysis.

Setting: Systematic search using PubMed and Scopus, from inception up to September 2016.

Subjects: Prospective observational studies reporting the estimates of all-cause and CVD mortality in relation to three or more categories of fish intake were included. Random-effects dose-response meta-analysis was conducted.

Results: Fourteen prospective cohort studies (ten publications) with 911 348 participants and 75 451 incident deaths were included. A 20 g/d increment in fish consumption was significantly and inversely associated with the risk of CVD mortality (relative risk=0·96; 95 % CI 0·94, 0·98; I 2=0 %, n 8) and marginally and inversely associated with the risk of all-cause mortality (relative risk=0·98; 95 % CI 0·97, 1·00; I 2=81·9 %, n 14). Subgroup analysis resulted in a significant association only in the subgroup of Asian studies, compared with Western studies, in both analyses. Analysis of Western studies suggested a nearly U-shaped association, with a nadir at fish consumption of ~20 g/d in analysis of both outcomes. Meanwhile, the associations appeared to be linear in Asian studies.

Conclusions: There was potential evidence of regional differences in the association between fish consumption and mortality. It may be helpful to examine the associations by considering types of fish consumed and methods of fish preparation.

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