P826 - PLANT-BASED DIETARY PATTERNS MITIGATE THE ASSOCIATION BETWEEN INDOOR AIR POLLUTION AND DEPRESSION AMONG OLDER ADULTS IN CHINA

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P826

PLANT-BASED DIETARY PATTERNS MITIGATE THE ASSOCIATION BETWEEN INDOOR AIR POLLUTION AND DEPRESSION AMONG OLDER ADULTS IN CHINA

J. Zhu1,*, Q. Lyu1,2

1First affiliated hospital of zhengzhou university, 2School of Public Health, Zhengzhou University, Zhengzhou, China

 

Rationale: Indoor air pollution has been identified as a contributing factor to the onset of depression, while adherence to plant-based diets is associated with reduced depressive symptoms. We aimed to explore the potential interaction of plant-based diets with depressive symptoms among older people.

Methods: We utilized cross-sectional data from the 2018 Chinese Longitudinal Healthy Longevity Survey (CLHLS), encompassing 11,371 participants aged 65 years and older. The overall plant-based diet index (PDI), healthful plant-based diet index (hPDI) and unhealthful plant-based diet index (uPDI) were calculated using dietary data from a simplified food frequency questionnaire (FFQ). Indoor air pollution exposure was assessed via cooking fuels, humidity, and mold presence. Depression was measured using the CES-D-10. Associations were evaluated using multivariable logistic regression, stratified by indoor air pollution, key covariates, and food groups.

Results: Participants exposed to severe indoor air pollution had 64% higher odds of depression (OR = 1.64, 95% CI: 1.41–1.92) compared to those with mild exposure. Higher adherence to the PDI and hPDI was associated with lower odds of depression (ORPDI = 0.81, 95% CI: 0.74–0.88; ORhPDI = 0.73, 95% CI: 0.68–0.79), especially in mild pollution environments. Conversely, the uPDI was linked to increased odds (ORuPDI = 1.86, 95% CI: 1.64–2.10). A significant interaction between PDI, hPDI and indoor air pollution was observed (P-interaction = 0.005, 0.004), highlighting the protective role of healthy plant-based diets.

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Conclusion: Plant-based dietary patterns may attenuate the impacts of indoor air pollution on depression among older Chinese adults. Adherence to plant-based dietary patterns may be useful to prevent depression caused by indoor air pollution.

Disclosure of Interest: None declared