We examined the relationship between subjective responses to alcohol and craving and drinking behavior using GEE models in which subjective responses and urge to drink at End Drink Report were predictors of the total number of drinks consumed during that episode, captured by the Morning Report. These analyses revealed that Urge to Drink (GEE parameter estimate = 0.44, SE = 0.12, z score = 3.74, p < .001) and Vigor (GEE parameter estimate = 0.43, SE = 0.15, z score = 3.01, p < .01) were positively associated with alcohol consumption. Conversely, Negative Mood (GEE parameter estimate = −0.04, SE = 0.21, z score = −0.20, p = .85) was not significantly associated with alcohol consumption. These results suggest that Vigor and Urge to Drink during the first two drinks, measured in the natural environment, predict subsequent alcohol consumption within that same drinking episode.
