Dose-response association between perinatal 25(OH)D status and postpartum depression

Area of Science:

• Perinatal mental health
• Nutritional psychiatry
• Maternal-child health

Background:

• Postpartum depression (PPD) is a significant perinatal disorder impacting maternal and infant well-being.
• The precise dose-response relationship between vitamin D (25(OH)D) levels during pregnancy and PPD risk, along with its predictive capacity, requires further clarification.

Purpose of the Study:

• To elucidate the dose-response relationship between perinatal serum 25(OH)D levels and the incidence of PPD.
• To evaluate the predictive value of perinatal 25(OH)D for PPD.
• To explore potential interactions between 25(OH)D, sunlight exposure, and supplementation in relation to PPD.

Main Methods:

• A cohort of 326 women was studied, with PPD assessed postpartum and serum 25(OH)D measured shortly after delivery.
• Statistical analyses included evaluating baseline characteristics, depression scores (EPDS), risk factors, dose-response effects, predictive performance (AUC), and interaction effects.

Main Results:

• PPD incidence was 23.31%; women with PPD had lower 25(OH)D levels, inversely correlated with depression scores.
• Each 1 ng/mL increase in perinatal 25(OH)D was associated with a 25% reduction in PPD risk (OR=0.75).
• An optimal cutoff of 24.26 ng/mL for 25(OH)D demonstrated good predictive utility (AUC=0.822), with significant protective effects from sunlight and supplementation.

Conclusions:

• Perinatal serum 25(OH)D levels exhibit a linear, inverse correlation with PPD risk, indicating significant screening potential.
• Exogenous vitamin D supplementation and sunlight exposure may modulate the protective association of 25(OH)D against PPD.