DISCUSSION
The diagnostic performance of the available postpartum depression screening tools fluctuates depending on many factors. This discrepancy may be due to differences in the methodology of the studies such as the screening tools used; the reference standards; or a combination of tools, and the cut off scores. Results may also be influenced by the time period analyzed by the tools; the timing of screening; and the patient populations studied. These disparities in published findings make it difficult to properly compare the available tools. Consequently, no recommendation can be made about the most effective tool for detecting PPD.
Given the increased prevalence rates of PPD among low socioeconomic patients, obese patients, adolescent mothers, racial and ethnic minorities and immigrant women [4], it is important to expand research efforts to these special populations. The accuracy of screening methods must be analyzed within the context of this diversity. Additionally, clarification is needed regarding current definitions of PPD [34], and how this may change between different patient populations.