Clinical Global Impressions Scale
The Clinical Global Impressions Scale is a clinician-administered two-part assessment developed by William Guy in the ECDEU Assessment Manual (1976) to provide rapid, global ratings of illness severity and treatment response. Part 1 (CGI-Severity) rates current severity; Part 2 (CGI-Improvement) rates change since treatment initiation. The CGI is among the most widely used global outcome measures in psychiatric research and clinical practice, prized for its brevity, interpretability, and ability to capture clinician expertise and nuanced clinical judgment.
Source record
Citations copied verbatim from the method’s source record. No claim-level verification is inferred from them.
- Guy, W. (1976). ECDEU Assessment Manual for Psychopharmacology. Rockville, MD: National Institute of Mental Health, US Department of Health, Education, and Welfare. · URL
- Busner, J., & Targum, S. D. (2007). The Clinical Global Impressions Scale: applying a research tool in clinical practice. Psychiatry (Edgmont), 4(7), 28–37. · URL
- Kadouri, A., Corruble, E., & Ly, K. H. (2007). The CGI: assessment of its usefulness in the context of a European multicentric antidepressant drug trial. European Neuropsychopharmacology, 17(6–7), 468–472. · URL
Curated claims
Claims persisted in the evidence ledger, each with its own assessment.
This view does not invent a claim assessment when the ledger has none.
Related methods
Generated from the method graph and shown as machine-suggested relations — no evidence claim is inferred.