Measurement
PHQ-9: Patient Health Questionnaire-9
Reference and/or access link:
Arroll, B., Goodyear-Smith, F., Crengle, S., Gunn, J., Kerse, N., Fishman, T., ... & Hatcher, S. (2010). Validation of PHQ-2 and PHQ-9 to screen for major depression in the primary care population. The annals of family medicine, 8(4), 348-353.