Patient Health Questionnaire 2 (PHQ-2)
The Patient Health Questionnaire 2 (PHQ-2) is used by some clinicians and organizations to screen patients for undiagnosed depression.
PHQ-2
PHQ-9 Depression Scale
The PHQ-9 is a depression scale consisting of nine questions. The PHQ-9 can be used as a tool for diagnosing depression as well as for monitoring the patient’s treatment.