SUBSTANCE USE PROBLEMS REPORTED BY COLLEGE STUDENTS: COMBINED MARIJUANA AND ALCOHOL USE VERSUS ALCOHOL-ONLY USE.

This study examines the relationships among selected demographic characteristics, alcohol use only, alcohol plus marijuana use and substance-use related problems. Data are from 409 randomly selected undergraduate college students attending a large urban university. Poly-substance users were more likely than alcohol only users to be younger and experience all substance-use related problems studied. The relationship between poly-substance use and increased substance use-associated problems was also identified when controlling for other common predictors of substance use problems. [ABSTRACT FROM AUTHOR]