In baseline models, exposure to traumatic accidents was associated with higher risk for lifetime marijuana, cocaine, and other drug use. After controlling for parent substance misuse, effect sizes were attenuated, and only cocaine use remained statistically significant. Witnessing a traumatic event or hearing about the PTEs of loved ones was associated with higher risk for marijuana and other drug use in baseline models. However, none of these associations remained significant after controlling for parent substance misuse. Unspecified PTEs were associated with higher risk for all types of drug use save cocaine in baseline models. After controlling for parent substance misuse, other PTEs were associated with higher risk for marijuana use (RR=1.48, CI: 1.14-1.93) and cocaine use (RR=1.84, CI: 1.21-2.80).
