“…This is consistent with previous observations that physician knowledge of a patient was associated with adherence to substance abuse treatment recommendations (Safran et al, 1998). Previous studies of barriers to provider discussions of substance use issues found that many providers are cautious or uncomfortable discussing substance use issues with patients (Aalto et al, 2003;Aira, Kauhanen, Larivaara, & Rautio, 2003;Kaner et al, 2001;McQuade, Levy, Yanek, Davis, & Liepman, 2000;Volk et al, 1996). A recent qualitative study of audiotaped patient-provider discussions during visits with at-risk drinkers revealed that providers were uncomfortable discussing alcohol issues, avoided direct discussions even when patients raised the subject, and gave advice that was vague or tenuous (McCormick et al, 2006).…”