@article{ref1,
title="Examining factorial structure and measurement invariance of the Brief Symptom Inventory (BSI)-18 among drug users",
journal="Addictive behaviors",
year="2010",
author="Wang, Jichuan and Kelly, Brian C. and Booth, Brenda M. and Falck, Russel S. and Leukefeld, Carl and Carlson, Robert G.",
volume="35",
number="1",
pages="23-29",
abstract="The 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.<p /><p>Language: en</p>",
language="en",
issn="0306-4603",
doi="10.1016/j.addbeh.2009.08.003",
url="http://dx.doi.org/10.1016/j.addbeh.2009.08.003"
}