Relationship Between Teen Marijuana Use and Use of Other Drugs

"Our results indicate a moderate relation between early teen marijuana use and young adult abuse of other illicit substances; however, this association fades from statistical significance with adjustments for stress and life-course variables. Likewise, our findings show that any causal influence of teen marijuana use on other illicit substance use is contingent upon employment status and is short-term, subsiding entirely by the age of 21. In light of these findings, we urge U.S. drug control policymakers to consider stress and life-course approaches in their pursuit of solutions to the 'drug problem.'"

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Van Gundy, Karen and Rebellon, Cesar J., "Life-course Perspective on the 'Gateway Hypothesis'". Journal of Health and Social Behavior. Thousand Oaks, CA. American Sociological Association. September 2010, p. 244.
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