Intakes of fish and polyunsaturated fatty acids and mild-to-severe cognitive impairment risks: a dose-response meta-analysis of 21 cohort studies

被引:234
作者
Zhang, Yu [1 ]
Chen, Jingnan [1 ]
Qiu, Jieni [2 ]
Li, Yingjun [3 ]
Wang, Jianbing [3 ]
Jiao, Jingjing [2 ]
机构
[1] Zhejiang Univ, Dept Food Sci & Nutr, Coll Biosyst Engn & Food Sci, Hangzhou 310003, Zhejiang, Peoples R China
[2] Zhejiang Univ, Sch Med, Dept Nutr, Hangzhou 310003, Zhejiang, Peoples R China
[3] Zhejiang Univ, Sch Med, Dept Epidemiol & Hlth Stat, Hangzhou 310003, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Alzheimer disease; cognitive impairment; dementia; fish; polyunsaturated fatty acids; ALZHEIMERS-DISEASE; DOCOSAHEXAENOIC ACID; VITAMIN-E; ATHEROSCLEROSIS RISK; MEDITERRANEAN DIET; APOLIPOPROTEIN-E; TREND ESTIMATION; DEMENTIA RISK; OLDER-ADULTS; LIFE-SPAN;
D O I
10.3945/ajcn.115.124081
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Background: The intake of fish and polyunsaturated fatty acids (PUFAs) may benefit cognitive function. However, optimal intake recommendations for protection are unknown. Objective: We systematically investigated associations between fish and PUFA intake and mild-to-severe cognitive impairment risk. Design: Studies that reported risk estimates for mild cognitive impairment (MCI), cognitive decline, dementia, Alzheimer disease (AD), or Parkinson disease (PD) from fish, total PUFAs, total n-3 (omega-3) PUFAs, or at least one n-3 PUFA were included. Study characteristics and outcomes were extracted. The pooled RR was estimated with the use of a random-effects model meta analysis. A dose-response analysis was conducted with the use of the 2-stage generalized least-squares trend program. Results: We included 21 studies (181,580 participants) with 4438 cases identified during follow-up periods (2.1-21 y). A 1-serving/wk increment of dietary fish was associated with lower risks of dementia (RR: 0.95; 95% CI: 0.90, 0.99; P = 0.042, I-2 = 63.4%) and AD (RR: 0.93; 95% CI: 0.90, 0.95; P = 0.003, I-2 = 74.8%). Pooled RRs of MCI and PD were 0.71 (95% CI: 0.59, 0.82; P = 0.733,12 = 0%) and 0.90 (95% CI: 0.80, 0.99; P = 0.221, I-2 = 33.7%), respectively, for an 8-g/d increment of PUFA intake. As an important source of marine n-3 PUFAs, a 0.1-g/d increment of dietary docosahexaenoic acid (DHA) intake was associated with lower risks of dementia (RR: 0.86; 95% CI: 0.76, 0.96; P < 0.001, I-2 = 92.7%) and AD (RR: 0.63; 95% CI: 0.51, 0.76; P < 0.001, I-2 = 94.5%). Significant curvilinear relations between fish consumption and risk of AD and between total PUFAs and risk of MCI (both P-nonlinearity < 0.001) were observed. Conclusions: Fishery products are recommended as dietary sources and are associated with lower risk of cognitive impairment. Marine derived DHA was associated with lower risk of dementia and AD but without a linear dose-response relation.
引用
收藏
页码:330 / 340
页数:11
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