Format Number of items PTSD     Posttraumatic Diagnostic Scale (Foa et al., 1997) Self-report 17 symptom, 9 functional impairment     PTSD Checklist (Blanchard et al., 1996) Self-report 17     Davidson Trauma Scale (Davidson et al., 1997) Self-report 17 SUDs     Alcohol Use Disorders Identification Test (Saunders et al., 1993) Self-report 10     Michigan Alcohol Screening Test (Selzer, 1971) Self-report or interview 22     Michigan Assessment Screening Test/Alcohol– Drug (Westermeyer et al., 2004) Self-report 25     Drug Abuse Screening Test (Skinner, 1982) Self-report or interview 20

SUD = substance-use disorder; PTSD = posttraumatic stress disorder.