An exploratory study of alcohol dependence and problem gambling co-development trajectories in young adults

This study examines whether there are multiple trajectories of alcohol dependence and problem gambling symptom co-occurrence in a sample (n = 679) of emerging adults. Six joint trajectory classes were identified and several baseline risk factors were associated with increased probability of being in more problematic joint trajectory classes relative to the low-risk normative class. There was no joint trajectory class characterized by both higher problem gambling risk and persistent high alcohol dependence, suggesting that alcohol dependence and problem gambling are not directly related but perhaps share common underlying causes. Contrary to this, though, none of the examined risk factors were common to both more problematic gambling and drinking trajectories. Overall, the findings (which should be considered exploratory due to small class sizes) suggest the co-development of alcohol and gambling is not uniform across all young adults, and that the reciprocal nature of this relationship in adulthood may not solidify until later in young adulthood. Future research should re-examine these findings with a larger sample, spanning further into adulthood, with additional risk factors.