Clinical Global Impression
Also written as: CGI — Clinical Global Impression
A brief clinician-rated assessment of psychiatric patients' illness severity and improvement, commonly used as CGI in research studies.
Full Definition
The Clinical Global Impression (CGI) is a widely used clinician-rated instrument in psychiatric research that provides a brief, global assessment of patient functioning. The scale consists of two main components: CGI-Severity (CGI-S), which rates current illness severity on a 7-point scale, and CGI-Improvement (CGI-I), which assesses change from baseline. This tool allows researchers to capture clinical judgment of overall patient status and treatment response in a standardized format.
Usage
Usage note: Specify which component (CGI-S or CGI-I) when discussing specific scores.
In Context
- "Treatment response was defined as a CGI-Improvement score of 1 or 2 at study endpoint." — Primary endpoint definition
- "Clinical Global Impression scores were obtained by blinded raters at each assessment visit." — Assessment procedures