Clinical Global Impression scale.

CGI

What it measures

Clinician global judgment of overall illness severity (CGI-S) and treatment-related improvement (CGI-I); efficacy index

Length and format

2-3 single-item ratings (CGI-S, CGI-I, Efficacy Index). 7-point clinician rating (CGI-S 1 normal - 7 extremely ill; CGI-I 1 very much improved - 7 very much worse) (clinician-rated/interview)

Language versions

Effectively all major clinical-trial languages; disorder-specific CGI versions translated worldwide

Normative data

No normative data held in our reference library for this instrument. That is a statement about our library, not about the published literature.

Licence

public-domain / open

Licence classification is a research judgement by the catalogue’s authors, not legal advice, and it can be out of date. Confirm terms with the copyright holder or publisher before using an instrument, especially for commercial use.

Reference

Guy, W. (1976). ECDEU Assessment Manual for Psychopharmacology (CGI). US DHEW, NIMH.