The validity of the CGI severity and improvement scales as measures of clinical effectiveness suitable for routine clinical use

Berk, Michael, Ng, Felicity, Dodd, Seetal, Callaly, Tom, Campbell, Shirley, Bernardo, Michelle and Trauer, Tom 2008, The validity of the CGI severity and improvement scales as measures of clinical effectiveness suitable for routine clinical use, Journal of evaluation of clinical practice, vol. 14, no. 6, pp. 979-983.

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Title The validity of the CGI severity and improvement scales as measures of clinical effectiveness suitable for routine clinical use
Author(s) Berk, Michael
Ng, Felicity
Dodd, Seetal
Callaly, Tom
Campbell, Shirley
Bernardo, Michelle
Trauer, Tom
Journal name Journal of evaluation of clinical practice
Volume number 14
Issue number 6
Start page 979
End page 983
Publisher Wiley-Blackwell Publishing
Place of publication Oxford, England
Publication date 2008-12
ISSN 1356-1294
1365-2753
Summary Objective The Clinical Global Impression Scale (CGI) is established as a core metric in psychiatric research. This study aims to test the validity of CGI as a clinical outcome measure suitable for routine use in a private inpatient setting.

Methods The CGI was added to a standard battery of routine outcome measures in a private psychiatric hospital. Data were collected on consecutive admissions over a period of 24 months, which included clinical diagnosis, demographics, service utilization and four routine measures (CGI, HoNOS, MHQ-14 and DASS-21) at both admission and discharge. Descriptive and comparative data analyses were performed.

Results Of 786 admissions in total, there were 624 and 614 CGI-S ratings completed at the point of admission and discharge, respectively, and 610 completed CGI-I ratings. The admission and discharge CGI-S scores were correlated (r = 0.40), and the indirect improvement measures obtained from their differences were highly correlated with the direct CGI-I scores (r = 0.71). The CGI results reflected similar trends seen in the other three outcome measures.

Conclusions The CGI is a valid clinical outcome measure suitable for routine use in an inpatient setting. It offers a number of advantages, including its established utility in psychiatric research, sensitivity to change, quick and simple administration, utility across diagnostic groupings, and reliability in the hands of skilled clinicians.
Language eng
Field of Research 119999 Medical and Health Sciences not elsewhere classified
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30035558

Document type: Journal Article
Collection: School of Medicine
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