The Clinical Global Impression-Schizophrenia (CGI-SCH) scale was designed to assess positive, negative, depressive and cognitive symptoms of schizophrenia. Research suggests that the CGI‐SCH scale is a valid and reliable questionnaire to evaluate severity and treatment response in schizophrenia. It has ten questions that are answered on a 1–7 scale. Simply put, it is simple, short, valid and has clinical value.