Figure 2.

(A) Prevalence of preterm birth in primiparous women, who were antidepressants users or non-users divided according to BMI. (B) Odds Ratio for preterm birth among antidepressants users with different BMIs compared with those, who were non-users with the same BMI. Women were considered as antidepressant users, if they had any purchase of antidepressants within a 12-month period before becoming pregnant and/or during pregnancy. Logistic regression models were used for both Figures (A,B). The models were stratified (five strata) using the propensity score. Propensity score includes the following variables: age, cohabiting, smoking, education, fertility treatments, previous pregnancies and gestational diabetes mellitus. BMI: body mass index.