Positive and negative effects of internalizing on alcohol use problems from childhood to young adulthood: The mediating and suppressing role of externalizing.
2018
A longstanding hypothesis is that some alcohol use problems (AUP) develop and are maintained through the ‘self-medication’ of internalizing (INT; depression and anxiety) problems. However, their high rate of co-occurrence with one another and with externalizing (EXT; antisocial behavior and impulse control) problems obscures any causal association since EXT may account for the INT-AUP link. Using a large community sample, we estimated prospective effects of INT and EXT on AUP via latent cross-lagged mediation panel spanning 14 years from childhood (ages 9–11) to young adulthood (ages 21–23). After adjusting for the cross-lagged, concurrent, and stability effects across factors, INT decreased AUP risk through its direct and indirect effects and increased AUP risk through shared variance with EXT. Between childhood and young adulthood, unique aspects of INT reduced risk for AUP while aspects of INT shared with EXT increased risk for AUP.
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