Interviewers assessed demographic characteristics including gender, race, marital status, education and income, as well as whether patients smoked tobacco every day, some days or not at all. Patients also completed the following self-administered screening questionnaires: the 9-item Patient Health Questionnaire (PHQ-9; ≥10 points positive screen for depression), the 7-item Generalized Anxiety Disorder Screen (GAD-7; ≥10 points positive screen), and the Post-Traumatic Stress Disorder (PTSD) Checklist (PCL-C; ≥50 points positive screen). Interviewers also administered the panic disorder and drug use disorders (DUD) modules of the DSM-IV MINI. A count measure of the number of mental health and drug use conditions was constructed by summing the total number of positive screens or diagnoses (depression, generalized anxiety, PTSD, panic, and DUD).
