7.16. Clinical Global Impressions scale (CGI, CGI-I)¶
The CGI rates illness severity, global improvement, and the efficacy/side-effect balance of treatment. The CGI-I is a subset with just the improvement subscale.
7.16.1. History and guide¶
Original: Guy (1976), at http://www.archive.org/stream/ecdeuassessmentm1933guyw — Guy W (1976) ECDEU Assessment Manual for Psychopharmacology, revised, 1976. Biometric Laboratory, The George Washington University, Maryland. US Department of Health, Education, and Welfare; Public Health Service; Alcohol, Drug Abuse, and Mental Health Administration; National Institute of Mental Health.
More detail at http://www.cnsforum.com/clinicalresources/ratingscales/ratingpsychiatry/global_clinical_impression/.
7.16.2. Source¶
Guy (1976), as above.
A trivial modification has been made: questions are asked about therapeutic effect and side effects separately, and are then combined to give the same score as the original CGI method (which required a simultaneous rating on those two dimensions).
7.16.3. Intellectual property rights¶
Work of the US federal government.
See http://www.cendi.gov/publications/04-8copyright.html#311; https://en.wikipedia.org/wiki/Copyright_status_of_work_by_the_U.S._government.