Preeclampsia as an Independent and Major Risk Factor for Significant Postpartum Depression Symptomatology: Results from a Prospective Cohort Study

Background/Objectives: Preeclampsia is a severe hypertensive disorder that has been linked to increased maternal psychiatric morbidity. However, existing literature remains inconsistent regarding whether this association is independent of underlying medical co-morbidities such as chronic hypertension and diabetes. Our objective was to precisely evaluate the Adjusted Odds Ratio (AOR) of developing Postpartum Depression symptomatology (probable PPD) following a diagnosis of preeclampsia in a prospectively tracked cohort, controlling for essential confounders. Methods: This prospective cohort study included 180 women (33 in the Preeclampsia group, 147 in the Normotensive reference group), with stringent exclusion of women with prior psychiatric history to reduce confounding. PPD was assessed postpartum using the Edinburgh Postnatal Depression Scale (EPDS ≥ 13 cutoff). Multivariable logistic regression was employed to calculate the AOR, adjusting for maternal age, chronic hypertension, and prepregnancy diabetes. Results: The multivariable analysis demonstrated a highly significant and independent association between the primary exposure and the outcome. Preeclampsia was associated with 12.7-fold increased odds of developing PPD (AOR: 12.7; 95% CI: 5.1–31.7; p < 0.001). In contrast, none of the included confounders—chronic hypertension (AOR: 1.96, p = 0.182), prepregnancy diabetes (AOR: 1.8, p = 0.372), or age (AOR: 0.99, p = 0.759)—showed a statistically significant independent association with PPD risk. The model achieved strong explanatory power (Nagelkerke R2 = 0.327; Omnibus Test p < 0.001). Conclusions: Preeclampsia represents a powerful and independent determinant of the risk for significant PPD symptomatology, substantially increasing the adjusted odds of the condition. These findings mandate that women with a history of preeclampsia be designated a high-risk group and receive immediate, mandatory, and intensified postpartum mental health surveillance and preferential access to specialized psychological support.