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Randomized Controlled Trial
. 2018 Dec 18;10(12):2000.
doi: 10.3390/nu10122000.

Seafood Consumption, Omega-3 Fatty Acids Intake, and Life-Time Prevalence of Depression in the PREDIMED-Plus Trial

Affiliations
Randomized Controlled Trial

Seafood Consumption, Omega-3 Fatty Acids Intake, and Life-Time Prevalence of Depression in the PREDIMED-Plus Trial

Almudena Sánchez-Villegas et al. Nutrients. .

Abstract

Background: The aim of this analysis was to ascertain the type of relationship between fish and seafood consumption, omega-3 polyunsaturated fatty acids (ω-3 PUFA) intake, and depression prevalence.

Methods: Cross-sectional analyses of the PREDIMED-Plus trial. Fish and seafood consumption and ω-3 PUFA intake were assessed through a validated food-frequency questionnaire. Self-reported life-time medical diagnosis of depression or use of antidepressants was considered as outcome. Depressive symptoms were collected by the Beck Depression Inventory-II. Logistic regression models were used to estimate the association between seafood products and ω-3 PUFA consumption and depression. Multiple linear regression models were fitted to assess the association between fish and long-chain (LC) ω-3 PUFA intake and depressive symptoms.

Results: Out of 6587 participants, there were 1367 cases of depression. Total seafood consumption was not associated with depression. The odds ratios (ORs) (95% confidence intervals (CIs)) for the 2nd, 3rd, and 4th quintiles of consumption of fatty fish were 0.77 (0.63⁻0.94), 0.71 (0.58⁻0.87), and 0.78 (0.64⁻0.96), respectively, and p for trend = 0.759. Moderate intake of total LC ω-3 PUFA (approximately 0.5⁻1 g/day) was significantly associated with a lower prevalence of depression.

Conclusion: In our study, moderate fish and LC ω-3 PUFA intake, but not high intake, was associated with lower odds of depression suggesting a U-shaped relationship.

Keywords: depression; docosahexaenoic acid; eicosapentaenoic acid; fish; omega-3.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Spline regression models. (A) Spline regression model of the odds ratio of depression according to fatty fish consumption (the dotted lines represent 95% CI). (B) Spline regression model of the odds ratio of depression according to LC ω-3 PUFA intake (the dotted lines represent 95% CI).
Figure 1
Figure 1
Spline regression models. (A) Spline regression model of the odds ratio of depression according to fatty fish consumption (the dotted lines represent 95% CI). (B) Spline regression model of the odds ratio of depression according to LC ω-3 PUFA intake (the dotted lines represent 95% CI).

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