Clinical Global Impressions — Improvement (CGI-I)
Assessment tool
Rate total improvement whether or not, in your judgment, it is due entirely to drug treatment. The improvement item may be omitted at the initial assessment by marking Not assessed. The admission/baseline comparison is required.
Guy W. (1976), NIMH ECDEU Assessment Manual for Psychopharmacology; public-domain federal instrument.
Responses stay in this page’s memory. Reset or leave the page to clear them. No patient identifiers are collected.
About this scale and references
Reference information · Questionnaire
- Last content update
- 2026-10-26
- Clinical review
- Not independently reviewed
- Source jurisdiction
- See individual sources
- Coverage
- Questionnaire
| Field | Instrument context |
|---|---|
| Version | NIMH ECDEU 1976 original English; standalone CGI-I |
| Population | Patients evaluated by a clinician familiar with their history and clinical population |
| Respondent | Clinician-rated |
| Recall period | Change since admission to the project |
| Purpose | Clinician global assessment; this rating is not a diagnosis |
Interpretation & limitations
- The result is the selected clinician rating; it is not inferred from another symptom total.
- Not assessed is a distinct non-result, not a zero-severity or zero-improvement score.
- This standalone item does not implement the CGI Efficacy Index or the other CGI component.
- Requires clinician judgment and clinical history. Do not use as a patient self-report questionnaire.
- No automated diagnosis, medication change or declaration of safety.
References · 3
- Guy (1976), ECDEU Assessment Manual, CGI form and guidance pp.217–222
- NIDA description of CGI ratings and required history
- CDISC public-domain status · Original NIMH federal-government instrument; CDISC identifies CGI as Public Domain.