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A bidirectional association exists between psychological disorders and obesity. Also, diet could impact on both of these disorders. The aim of this study was to evaluate the association between plant-based dietary patterns and psychological profile and obesity.

This cross-sectional study was performed in a sample of 435 Iranian women. A validated and reliable semi-quantitative food-frequency questionnaire was used to collect dietary data. Three dietary indices including an overall plant-based diet (PDI), healthful plant-based diet (hPDI), and unhealthful plant-based diet (uPDI) were determined. Body mass index (BMI) and waist circumference (WC) were used to define general and abdominal obesity, respectively. Psychological profile status was determined from the DASS-21 questionnaire.

We found that higher uPDI scores increased the odds of overall (PDI: 2.62; 95% CI 1.28–5.35, P …