Observer Global Impression Generic Modification Version Questionnaire

**Semantic type:** Intellectual Product

**Definition:** A modified version of a standardized questionnaire published in 1976 by Guy et al. that was initially created to provide an observer-determined summary measure of a patient's global functioning prior to and after initiating a study medication. It has been modified for use in any disease/condition concept use case.

**Synonyms:** - OGI - OGI Generic Modification Version - OGI01