Fig. 1From: The reliability and validity of PHQ-9 in patients with major depressive disorder in psychiatric hospitalSchematic illustration of the study design and patient-selection criteria. PHQ-9: Patient Health Questionnaire 9 items, Hamilton Rating Scale for Depression; PCC, primary care clinic; HAMD-17: Hamilton Depression Scale 17 items; DSM-IV: Diagnostic and Statistical Manual of Mental Disorders, fourth editionBack to article page