Supported by MH079979 and MH083914 from NIH and Guilford Press and Training Institute for Child and Adolescent Eating Disorders, LLC.
The clinician administered staging instrument for anorexia nervosa: Development and psychometric properties†
Article first published online: 30 AUG 2011
Copyright © 2011 Wiley Periodicals, Inc.
International Journal of Eating Disorders
Volume 45, Issue 3, pages 390–399, April 2012
How to Cite
Maguire, S., Touyz, S., Surgenor, L., Crosby, R. D., Engel, S. G., Lacey, H., Heywood-Everett, S. and Le Grange, D. (2012), The clinician administered staging instrument for anorexia nervosa: Development and psychometric properties. Int. J. Eat. Disord., 45: 390–399. doi: 10.1002/eat.20951
- Issue published online: 8 MAR 2012
- Article first published online: 30 AUG 2011
- Manuscript Accepted: 19 JUN 2011
- NIH. Grant Numbers: MH079979, MH083914
- Guilford Press and Training Institute
- anorexia nervosa;
- eating disorders
To develop and evaluate an instrument to assess severity in anorexia nervosa (AN), the Clinician Administered Staging Instrument for Anorexia Nervosa (CASIAN).
Candidate items for the CASIAN were developed in three phases (domain, content, and item generation) followed by a pilot study. The psychometric properties of the resultant 34-item questionnaire were investigated in cross-sectional and longitudinal samples (N = 171) with DSM-IV AN and subthreshold AN.
Item and factor analysis procedures resulted in a refined 23-item CASIAN comprising of six factors (“Motivation,” “Weight,” “Illness Duration,” “Obsessionality,” “Bulimic Behaviors,” and “Acute Issues”). The CASIAN had high internal consistency (.811), test–retest (.957), and interrater reliability (.973). Preliminary support for the convergent, discriminant, concurrent, and predictive validity of the CASIAN was found.
The CASIAN is a psychometrically sound instrument. Further studies are needed to confirm the factor structure and assess its clinical and research utility. © 2011 by Wiley Periodicals, Inc. (Int J Eat Disord 2012)