“…Relevant to the current study, psychiatric symptoms among drug users are widespread and often ignored despite research that gives evidence to the improved treatment process and outcomes of individuals who are correctly and comorbidly diagnosed (Cornelius, Bukstein, Salloum, & Clark, 2003;Cornelius et al, 1995;De Bernado, Newcomb, Toth, Richey, & Mendoza, 2002;Drake & Wallach, 2000). Use of psychiatric screening instruments is thus becoming increasingly common in substance abuse treatment settings, and the psychometric validation of such tools with these populations must be established (Johnson, Brems, Freemon, & Mills, 2005). The current study seeks to confirm the factor structure of the BDI-II with drug users to establish the appropriate interpretation of test results.…”