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Dietary inflammatory index and depression: a meta-analysis

  • Jian Wang (a1), Yao Zhou (a1), Kang Chen (a1), Yuntian Jing (a1), Jiaan He (a1), Hongxiao Sun (a1) and Xinhua Hu (a1)...

Abstract

Objective

The purpose of the present meta-analysis was to evaluate the association between the inflammatory potential of diet, determined by the dietary inflammatory index (DII®) score, and depression.

Design

Systematic review and meta-analysis.

Setting

A comprehensive literature search was conducted in PubMed, Web of Science and EMBASE databases up to August 2018. All observational studies that examined the association of the DII score with depression/depressive symptoms were included.

Subjects

Four prospective cohorts and two cross-sectional studies enrolling a total of 49 584 subjects.

Results

Overall, individuals in the highest DII v. the lowest DII category had a 23 % higher risk of depression (risk ratio (RR)=1·23; 95 % CI 1·12, 1·35). When stratified by study design, the pooled RR was 1·25 (95 % CI 1·12, 1·40) for the prospective cohort studies and 1·16 (95 % CI 0·96, 1·41) for the cross-sectional studies. Gender-specific analysis showed that this association was observed in women (RR=1·25; 95 % CI 1·09, 1·42) but was not statistically significant in men (RR=1·15; 95 % CI 0·83, 1·59).

Conclusions

The meta-analysis suggests that pro-inflammatory diet estimated by a higher DII score is independently associated with an increased risk of depression, particularly in women. However, more well-designed studies are needed to evaluate whether an anti-inflammatory diet can reduce the risk of depression.

Copyright

Corresponding author

*Corresponding author: Email xinhuahu@126.com

Footnotes

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Jian Wang, Yao Zhou and Kang Chen contributed equally to this article.

Footnotes

References

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