Alzheimer's Disease Cooperative Study-Clinical Global Impression of Change Questionnaire

**Semantic type:** Intellectual Product

**Definition:** A standardized rating scale developed by Lon S. Schneider in 1997 to evaluate a clinically relevant change in an individual's Alzheimer's Disease symptoms. This instrument consists of an interview that is given to both the patient and their caregiver by a clinician at a baseline visit and then is repeated at the 2, 6, and 12 month visits. Based on the information gather at the 2, 6, and 12 month visits, the clinician rates the patients change from baseline on a 7 increment scale ranging from 'Marked Improvement' to 'Marked Worsening.'

**Synonyms:** - ACGC01 - ADCS-CGIC - ADCS-CGIC