The Factor Reliability and Convergent Validity of the Patient Health Questionnaire-4 Among an International Sample of Pregnant Women.

Pregnant women are at an increased risk for anxiety and depression, but a majority of women go untreated due to a high rate of undetected symptoms. The 4-item Patient Health Questionnaire (PHQ-4) is an ultrabrief screening instrument for anxiety and depression with sound psychometric properties demonstrated in the general population and primary care, but not among pregnant women. The aim of this study was to provide initial evidence of the validity and reliability of the PHQ-4 among pregnant women.