Abstract
Objectives
To assess the cross-sectional and longitudinal associations between nut consumption and depression in two cohorts of older adults.
Design, Setting, Participants and Measurements
The first cohort (Seniors-ENRICA-I or SE-I) included a representative sample of Spanish noninstitutionalized adults aged ≥65 years interviewed in 2010 and 2013. The second cohort (SE-II) included individuals from the Madrid region, Spain, aged ≥65 years interviewed in 2017 and in 2019. Nut consumption was estimated with a validated computer-based diet history. Depression was defined as self-reported physician-diagnosed depression or the use of antidepressants. Logistic regression models were adjusted for the main confounders. The DerSimonian and Laird random-effect method was used to meta-analyze the results from both studies. A participant-level pooled analysis was conducted to examine the robustness of our analyses.
Results
The SE-I included 2278 individuals (233 prevalent cases) in the cross-sectional analysis and 1534 (108 incident cases) in the longitudinal analysis; the corresponding figures for SE-II were 2726 (407 prevalent cases) and 1566 (74 incident cases). In the meta-analysis of cross-sectional results from the two studies, compared to consuming <1 serving (30 g) of nuts/week, the odds ratio (95% confidence interval) for depression was 0.90 (0.64, 1.16) for consuming 1 to <3 servings/week and 0.92 (0.70, 1.13) for consuming ≥3 servings/week; the corresponding figures for the longitudinal results were 0.90 (0.41, 1.38) and 0.66 (0.35, 0.97).
Conclusion
Nut consumption was associated with a lower risk of depression in a pooled longitudinal analysis using data from two cohorts of older adults. Nuts should be recommended as part of a healthy diet in older adults.
Data availability: Data described in the manuscript, code book, and analytic code will be made available upon request pending application and approval.
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Acknowledgments
We thank all participants in the Seniors-ENRICA studies.
Funding
Funding: This work was supported by the Fondo de Investigación Sociosanitaria (FIS) grants 19/319 (State Secretary of R + D + I and FEDER/FSE), the REACT EU Program, Comunidad de Madrid and the European Regional Development Fund (ERDF) - European Union: FACINGLCOVID-CM project, and FEDER funds from the European Union (CB16/10/00477). A.E.M. is financially supported by a ‘Beatriz Galindo’ contract (BEAGAL18/00093) from the Spanish Ministry of Education, Culture and Sport. B. B.-P. is supported by a grant from the Universidad de Castilla-La Mancha co-financed by the European Social Fund (2020-PREDUCLM-16746). R.F.-R. is supported by a grant from the Spanish Ministry of Education, Culture and Sport (FPU 19/00167). The funders played no role in the study design, data collection or analysis, decision to publish, or preparation of the manuscript.
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Author contributions: Rubén Fernández-Rodríguez contributed to the conception and design, analysis and interpretation of data, and drafting and revision of the paper for important intellectual content. Rosario Ortolá contributed to acquisition of data and drafting and revision of the paper for important intellectual content. Vicente Martínez-Vizcaíno contributed to the conception and design and the drafting and revision of the paper for important intellectual content. Bruno Bizzozero-Peroni contributed to drafting and revision of the paper for important intellectual content. Fernando Rodríguez-Artalejo contributed to the conception and design, acquisition of data, and drafting and revision of the paper for important intellectual content. Esther García-Esquinas contributed to acquisition of data and drafting and revision of the paper for important intellectual content. Esther López-García contributed to acquisition of data and drafting and revision of the paper for important intellectual content. Arthur Eumann Mesas contributed to the conception and design, analysis and interpretation of data, and drafting and revision of the paper for important intellectual content. All authors approved the final approval of the manuscript.
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Statement of Ethics: Both the SE-I and SE-II studies were approved by the Clinical Research Ethics Committee of the La Paz University Hospital in Madrid, and participants provided informed written consent.
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Conflicts of interest: The authors declare no conflicts of interest.
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Fernández-Rodríguez, R., Ortolá, R., Martínez-Vizcaíno, V. et al. Nut Consumption and Depression: Cross-Sectional and Longitudinal Analyses in Two Cohorts of Older Adults. J Nutr Health Aging 27, 448–456 (2023). https://doi.org/10.1007/s12603-023-1927-8
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DOI: https://doi.org/10.1007/s12603-023-1927-8