Fig. 1: Association between PDIs and DepS using a restricted cubic splines regression model.

PDIs plant-based diet indices, PDI overall plant-based diet index, hPDI healthful plant-based diet index, uPDI unhealthful plant-based diet index, DepS depressive symptoms. The RCS curves incorporating all confounders, sex, age, education level, household income, marital status, physical activity, smoking status, alcohol consumption, total energy intake, BMI, diabetes, CVD, and hypertension.