ECDEU Assessment Manual for Psychopharmacology
Revised (DHEW Publ No ADM 76-338). Rockville, MD, U.S. Department of Health, Education, and Welfare,
I➜The Clinical Global Impression scale (commonly abbreviated CGI scale) is a standardized assessment tool, widely used in clinical psychopharmacology trials as an outcome measure. Its goal is to allow the clinician to rate the severity of illness, change over time, and efficacy of medication, taking into account the patient’s clinical condition and the severity of side effects. In 1997, Spearing et al. have developed a modification of the CGI Scale for use in assessing global illness severity and change in patients with bipolar disorder.