Examining Factorial Structure and Measurement Invariance of the Brief Symptom Inventory (BSI)-18 among Drug UsersAddictive Behaviors
AbstractThe purpose of this study is to examine the factorial structure of the Brief Symptom Inventory 18 (BSI-18) and test its measurement invariance among different drug using populations. A total sample of 710 drug users was recruited using respondent-drive sampling (RDS) from three states: Ohio (n = 248), Arkansas (n = 237), and Kentucky (n = 225). The results of confirmatory factor analysis (CFA) show: 1) the BSI-18 has a three-factor structure (somatization, depression, and anxiety) with an underlying second-order factor (global severity index of distress); and 2) its factorial structure and metric (factor loadings) are invariant across populations under study. However, the scalars (intercepts) of the BSI-18 items are not invariant, and the means of the latent factors also varied across populations. Our findings provide evidence of a valid factorial structure of the BSI-18 that can be readily applied to studying drug using populations.
Citation InformationJichuan Wang, Brian C. Kelly, Brenda M. Booth, Russel S. Falck, et al.. "Examining Factorial Structure and Measurement Invariance of the Brief Symptom Inventory (BSI)-18 among Drug Users" Addictive Behaviors Vol. 35 Iss. 1 (2010) p. 23 - 29 ISSN: 03064603
Available at: http://works.bepress.com/robert_carlson/57/