The improvement score should Linking of CGI–I score and percentage BPRS change from baseline. The clinical global impression (CGI) rating scales (Guy) are commonly used clinician-rated measures of global symptom severity and treatment response for patients with mental disorders Once a clinician has learned to apply the CGI it takes less thanseconds to write the appropriate score into the patient’s chart: thus providing an excellent method for monitoring a patient’s progress over time. CGI. Defi