Journal of general internal medicine
-
Meta Analysis
Screening for depression in medical settings with the Patient Health Questionnaire (PHQ): a diagnostic meta-analysis.
To summarize the psychometric properties of the PHQ2 and PHQ9 as screening instruments for depression. ⋯ The PHQ9 is acceptable, and as good as longer clinician-administered instruments in a range of settings, countries, and populations. More research is needed to validate the PHQ2 to see if its diagnostic properties approach those of the PHQ9.