The postpartum depression screening scale: is it valid to screen for antenatal depression?

Area of Science:

• Psychiatry
• Clinical Psychology
• Obstetrics

Background:

• Antenatal depression poses risks to maternal and infant well-being.
• Screening tools are crucial for early identification and intervention.
• The Portuguese Postpartum Depression Screening Scale (PDSS) is validated for postpartum use.

Purpose of the Study:

• To evaluate the psychometric properties of a modified PDSS for antenatal depression screening.
• To establish PDSS cutoff points for diagnosing depression based on DSM-IV and ICD-10 criteria.
• To compare the screening performance of the PDSS with the Beck Depression Inventory-II (BDI-II).

Main Methods:

• A cohort of 503 pregnant women in their third trimester participated.
• Participants completed the modified PDSS and BDI-II.
• Depression diagnoses were confirmed via face-to-face interviews using the Diagnostic Interview for Genetic Studies and Operational Criteria Checklist for Psychotic Illness.

Main Results:

• The modified PDSS demonstrated very good reliability and validity for antenatal depression screening.
• The scale achieved satisfactory sensitivity and specificity (approximately 80%).
• PDSS showed comparable or superior performance to BDI-II, with enhanced specificity for the maternal context.

Conclusions:

• The modified PDSS is a valid and accurate instrument for screening antenatal depression.
• Its strong psychometric properties support its use in clinical and epidemiological settings.
• The PDSS offers a context-specific advantage over general depression inventories for pregnant populations.