The self-rated Inventory of Depressive Symptomatology for screening prenatal depression

Abstract

Objective: To examine whether the self-reported version of the Inventory of Depressive Symptomatology (IDS-SR), which is used for major depression, is a reliable tool for screening and assessment of prenatal depression. Methods: Between June 2006 and July 2008, pregnant women attending a teaching hospital in Sao Paulo, Brazil, completed the Portuguese version of the IDS-SR. Trained psychologists diagnosed depression via the Primary Care Evaluation of Mental Disorders questionnaire, which is based on the Diagnostic and Statistical Manual of Mental Disorders IV. Results: Of 543 participants, 60 (11%) were diagnosed with depression. The Cronbach alpha of the IDS-SR was 0.89, and the area under the ROC curve was 0.8. The IDS-SR cutoff score at 30 gave a sensitivity and specificity of 78% and 76%, respectively, for diagnosis of prenatal depression. Exploratory and confirmatory analyses revealed a 2-factor structure for the IDS-SR, characterized by symptoms of ""mood/cognition"" and ""irritability/anxiety/pain"". Conclusion: The IDS-SR gave satisfactory internal consistency and accuracy for diagnosing prenatal depression, showing that it can improve early diagnosis and treatment of this condition, thereby minimizing the burden. In addition, a 2-factor model was found to account for depressive symptomatology during pregnancy, which will be useful for developing further depression subscales specific to prenatal depression.