LAUSR

Background Since an association has been found between diet and psychological problems, this study aimed to evaluate the relationship between dietary habits and psychological problems among Iranian adults. Methods Data on dietary habits and psychological problems among 9965 adults were provided from the recruitment phase of Yazd Health Study, a population-based cohort research on Iranian adults. The association between dietary habits and psychological problems was assessed by multiple logistic regression analysis. Results After the adjustment for confounders, fast food and fried food consumptions were associated with increased depressive [odds ratio (OR) = 1.61, 95% confidence interval (CI) 1.18–2.20] and stress symptoms (OR = 2.47, 95% CI 1.46–4.18), respectively. Eating breakfast had a protective role on stress features (OR = 0.60, 95% CI 0.39–0.92), while snack intake was related to higher odds of depressive (OR = 1.36, 95% CI 1.01–1.84), anxiety (OR = 1.99, 95% CI 1.55–2.56) and stress symptoms (OR = 1.73, 95% CI 1.23–2.54). There was also an inverse association between sweetened drink consumption and depressive (OR = 0.76, 95% CI 0.59–0.96), anxiety (OR = 0.76, 95% CI 0.62–0.93), and stress features (OR = 0.73, 95% CI 0.55–0.97; OR = 0.63, 95% CI 0.48–0.82). Conclusions Even though an inverse relationship was found between sweetened drinks intake and psychological problems, snack consumption was associated with higher chances of them. Eating breakfast had a protective effect on stress symptoms, while fast food and fried food intakes were related to increased depressive and stress features chances, respectively.