All smokers were initially screened in a 40-min telephone interview to establish their initial eligibility for the study. Potential participants were administered a telephone version of the PRIME-MD semistructured interview (Spitzer et al., 1994), which screened for major mental disorders and substance use. Participants who were deemed initially eligible after the telephone screening attended a screening session where biochemical verification of smoking status was assessed and questionnaires completed concerning their demographic, medical, mood, and smoking history.
