Data from the 1991-1994 Drug Abuse Treatment Outcome Study on cocaine usage patterns.
A data frame with 7592 observations on the following 2 variables.
a factor with levels
a factor recording self-reported method of cocaine ingestion with levels
The data are extracted from the 1991-1994 Drug Abuse Treatment Outcome Study (2010) data (DATOS).
United States Department of Health and Human Services and National Institute of Health and National Institute on Drug Abuse (2010). Drug Abuse Treatment Outcome Study, 1991-1994. Ann Arbor, MI: Inter-university Consortium for Political and Social Research.