Investigation of the relationship between salivary nitrate levels and perinatal anxiety and postpartum depression

This study is the first to demonstrate a significant association between salivary nitrite levels and the occurrence of postpartum depression (PPD), with this association being particularly pronounced at 28 days postpartum. Perinatal anxiety and information needs were also identified as important predictors of PPD. This research provides a new perspective for the early screening and intervention of PPD and points the way for future studies to further explore its mechanisms and predictive factors.