Objective: To determine whether true-and false-positive postnatal depression screening scores can be distinguished during the early postpartum period by examining characteristic differences between 2 groups: 1) women with depressive symptomatology at 1 week postpartum who continue to exhibit symptoms at 8 weeks postpartum, compared with those who do not; and 2) women with depressive symptomatology at 8 weeks postpartum who previously exhibited symptoms at 1 week postpartum, compared with those who did not.
Method:As part of a longitudinal postpartum depression study, a population-based sample of 594 women completed mailed questionnaires at 1, 4, and 8 weeks postpartum.Results: Among women with depressive symptomatology at 1 week postpartum, diverse variables distinguished between those whose symptoms persisted or remitted at 8 weeks. These variables included recent immigrant status, psychiatric history, premenstrual symptoms, vulnerable personality, low self-esteem, child abuse history, and insufficient support. Variables that distinguished between women with depressive symptomatology at 8 weeks postpartum who previously exhibited symptoms at 1 week postpartum and those who did not included vulnerable personality, life stressors, perceived stress, insufficient support, and partner conflict.
Conclusions:To address both the benefits and potential harms of early screening, positive screening scores on the Edinburgh Postnatal Depression Scale should also include an assessment of each individual woman's risk for postpartum depression and (or) chronic major depression. (Can J Psychiatry 2006;51:265-273) Information on funding and support and author affiliations appears at the end of the article.
Clinical Implications· Health professionals should be aware of the high rate of false-positive scores likely to result when screening tools are administered during the immediate postpartum period. · Screening in the immediate postpartum period can identify most women with depressive symptoms at 8 weeks postpartum, possibly facilitating earlier receipt of care. · To address both the benefits and potential harms of early screening, positive screening scores obtained with the EPDS in the immediate postpartum period should also include an assessment of each individual woman's risk for postpartum depression and (or) chronic major depression.
Limitations· Although the EPDS has established psychometric properties in screening for depression, no diagnostic measure of depression was administered in this study. · Although the study sample was diverse in relation to socioeconomic and educational levels, the number of ethnic minority and single mothers was reduced.