Abstract
This study explored the reliability and validity of a nine-item screening tool (Co-Occurring Joint Action Council [COJAC] Screening Tool [CST]) for co-occurring disorders (COD). Using a convenience sample (n=1,951), an online survey was conducted in multiple settings and included demographic questions, the CST, the Global Appraisal of Individual Needs-Short Screener (GAIN-SS), and the Posttraumatic Stress Disorder Checklist-Civilian version. The CST substance abuse (SA) scale performed well with a Cronbach's alpha of .84 and a correlation of .71 with GAIN-SS SA (past year). The CST mental health and trauma items did not perform well as scales with Cronbach's alphas of .64 and .56, respectively. The CST-SA is a short, reliable, and valid measure of SA. Further study is needed to determine the best evaluation tool for the mental health portion of the COD screening instrument.
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