And in 79.3% of episodes participants reported the presence of contextual alcohol cues, such as the people they drink with, place where they drink, time of day when they drink, day of week they drink, or other cues. Participants reported smoking a cigarette while drinking on 27.8% of episodes. Analyses revealed no significant differences in eBAC as a function of OPRM1 (GEE parameter estimate = −0.004, SE = 0.003, z score = −1.37, p = .17) or DRD4 (GEE parameter estimate = −0.003, SE = 0.004, z score = 0.83, p = .41) genotypes. There was, however, a significant association between gender and eBAC (GEE parameter estimate = 0.008, SE = 0.002, z score = 4.20, p < .001), suggesting higher eBAC for females.
