Objective: The aim of this study was to assess the psychometric properties of the Patient Health Questionnaire (PHQ)-8, and the PHQ-2, a two-item version of the PHQ, respectively, in pregnancy. These screeners were compared to a structured diagnostic interview in a cohort of pregnant women attending prenatal care. Based upon studies documenting high sensitivity and specificity on the PHQ-8 and PHQ-2 in the general adult population, we hypothesized that both instruments would be effective in this population. Methods: Two hundred eighteen women, 13 of them depressed, were given the Composite International Diagnostic Interview and the PHQ-8 before 17 weeks of pregnancy. Receiver Operating Characteristic curves determined optimal thresholds and sensitivity and specificity were calculated using both dimensional and categorical approaches. Agreement between the PHQ-2 and PHQ-8 was measured using Cohen's kappa. Results: Optimal cutoffs for the PHQ-8 and PHQ-2 were 11 and 4, respectively. Using these cutoffs, the PHQ-8 had a sensitivity of 77% and a specificity of 62% while the PHQ-2 had a sensitivity of 62% and a specificity of 79%. The categorical method of scoring the PHQ-8 yielded a sensitivity of 54% and a specificity of 84%. Conclusions: In our sample, the PHQ-8 and PHQ-2 performed almost equally in detecting probable major depressive disorder in a sample of pregnant women. The categorical scoring method for the PHQ-8 had lower sensitivity but slightly higher specificity than the dimensional version. We found the PHQ-8 and PHQ-2 to have lower sensitivity and specificity in our pregnant population as compared to findings in nonpregnant populations; however, characteristics of our sample and choice of diagnostics instrument could explain these discrepant findings.
|Original language||English (US)|
|Number of pages||5|
|Journal||General Hospital Psychiatry|
|State||Published - Sep 2010|
All Science Journal Classification (ASJC) codes
- Psychiatry and Mental health