방법 비교

	Sheehan Disability Scale (SDS)	Patient Health Questionnaire-9 (PHQ-9)
분야	임상심리학	임상심리학
계열	Process / pipeline	Process / pipeline
기원 연도	1983	2001
창시자	David V. Sheehan	Kurt Kroenke
유형	Self-report questionnaire	Self-report questionnaire
원전	Sheehan, D. V. (1983). The Anxiety Disease. New York: Scribner. ISBN: 9780684183078	Kroenke, K., Spitzer, R. L., & Williams, J. B. (2001). The PHQ-9: validity of a brief depression severity measure. Journal of General Internal Medicine, 16(9), 606–613.
별칭	SDS, Sheehan Disability Scale	PHQ-9, Patient Health Questionnaire Depression Module
관련	4	5
요약	The Sheehan Disability Scale is a brief three-item self-report measure designed by David V. Sheehan to assess functional impairment across work/school, social life, and family life domains in psychiatric and medical disorders. First described in Sheehan's 1983 book 'The Anxiety Disease' and validated in multiple studies since, the SDS quantifies the degree to which a patient's illness interferes with major life domains. It is widely used in psychiatric research and clinical practice to assess the functional impact of depression, anxiety, ADHD, and other conditions, complementing symptom severity measures by capturing real-world impairment.	The PHQ-9 is a brief, nine-item self-report questionnaire developed by Kroenke, Spitzer, and Williams to screen for and measure the severity of depressive symptoms. Published in 2001 in the Journal of General Internal Medicine, it has become one of the most widely used depression screening instruments globally. The scale maps directly to DSM-IV diagnostic criteria for major depressive disorder, making it valuable in both clinical and research settings.