. 2007 Dec 31;2(3):95–101.

Table 2: Screening tools for depression.

Tools	Address²²	Rating / Purpose	Population
Patient Health Questionnaire (PHQ)²⁰ PHQ is a trademark of Pfizer Inc. www.pfizer.com/phq-9	Dr Robert L. Spitzer Columbia University, 1051 Riverside Drive, Unit 60, NYS Psychiatric Institute, New York, NY 10032, USA	Self-report. To screen for depression in primary care.	Adults and adolescents
Hamilton Depression Rating Scale (HDRS or Ham-D)²⁴See Appendix	Public Domain	Clinician rated. To assess severity of depression and change in symptoms.	Adults
Geriatric Depression Scale (GDS)²⁶	Dr Jerome Yesavage Stanford University School of Medicine Stanford, CA 94305-5548, USA	Self report. To assess depression in older adults.	People aged ≥65 years