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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2010 May 31;111(3):191–199. doi: 10.1016/j.drugalcdep.2010.04.012

Table 1.

Demographics by group. KMSK is the Kreek/McHugh/Schluger/Kellogg scale (Kellog et al., 2003).

Variable Cocaine
dependent subjects		 Non-drug using controls
Age 41.03 ± 9.14* 34.27 ± 10.19
Gender 21 M, 8 F 21 M 8 F
KMSK Cocaine
Frequency 6.0 ± 1.36
Duration 2.0 ± 0.89
Amount 4.0 ± 1.83
Total 12.0 ± 2.78
 Addiction Severity Index
 Years of Cocaine Use 12.66 ± 7.73
*

significant difference between groups p < 0.05.