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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: Compr Psychiatry. 2011 Jan 22;52(6):744–753. doi: 10.1016/j.comppsych.2010.11.005

Table 1.

Drug Dependence Descriptive across Samples

% Acknowledging Dependence
Drug Class Both Samples Smokers Substance Users
Alcohol 14.5 1.9 39.2
Marijuana 7.2 3.2 15.2
Crack/Cocaine 28.5 4.5 75.9
Opiates 11.1 1.3 30.4
PCP 2.1 1.3 3.8
Dependent on one drug 20.4 6.4 48.1
Dependent on two drugs 13.2 0.0 39.2
Dependent on three drugs 5.5 1.9 12.7