Measuring insight through patient self-report: An in-depth analysis of the factor structure of the Birchwood Insight Scale

PSYCHIATRY RESEARCH

卷:216

Article

Cleary, Sean D.¹  Bhatty, Sanaa²  Broussard, Beth³  Cristofaro, Sarah L.⁴  Wan, Claire Ramsay⁴  Compton, Michael T.^3,5 

[1] George Washington Univ, Sch Publ Hlth & Hlth Serv, Dept Epidemiol & Biostat, Washington, DC USA

[2] George Washington Univ, Sch Med & Hlth Sci, Dept Psychiat & Behav Sci, Washington, DC 20052 USA

[3] Lenox Hill Hosp, Dept Psychiat, New York, NY 10075 USA

[4] Emory Univ, Sch Med, Dept Psychiat & Behav Sci, Atlanta, GA USA

[5] Hofstra Univ, Dept Psychiat, Hofstra North Shore LIJ Sch Med, Hempstead, NY 11550 USA

关键词: Awareness of illness;    Birchwood Insight Scale;    First-episode psychosis;    Insight;    Psychosis;    Schizophrenia;    Serious mental illness;   

DOI  :  10.1016/j.psychres.2014.01.043

来源: Elsevier

【 摘 要 】

Little research has focused on item analysis and factor structure of the most commonly used measures of insight. We examined the factorial structure of the Birchwood Insight Scale (BIS), a brief, easy-to-administer, self-report measure. We studied the BIS in 327 first-episode psychosis patients, including a test sample (n=163) and a validation sample (n=164). We then used data from 100 patients with chronic serious mental illnesses as a second, external validation sample. Exploratory factor analysis was conducted with the test subsample, and confirmatory factor analyses with the two validation samples. Confirmatory factor analyses (in both the first-episode psychosis validation sample and the chronic serious mental illness sample) indicated that a single-factor solution, with seven items loading on a single factor with item 1 (Some of your symptoms are made by your mind) eliminated was the best-fitting model. Seven of the eight original BIS items loading on a single factor fit the data well in these samples. Researchers using this efficient measure of patient-reported insight should assess the item distributions and factor structure of the BIS in their samples, and potentially consider eliminating item 1. (C) 2014 Elsevier Ireland Ltd. All rights reserved.

【 授权许可】

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