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. Author manuscript; available in PMC: 2011 Jan 30.
Published in final edited form as: Psychiatry Res. 2010 Jan 30;181(1):15–23. doi: 10.1016/j.pscychresns.2009.07.009

Table 1.

Demographic and drug use history for participants

Controls Users
Age 31.1 ± 5.1 39.8 ± 3.7
Females (percent) 43 40
Alcohol (AUDIT score) 3.5 ± 3.9 8.1 ± 5.4
Smokers (percent) 29 93*
Smoking (pack years) 187.5 ± 83.8 214.0 ± 150.0
Depression (BDI) 2.0 ± 2.9 22.3 ± 12.2*
Anxiety (Speilberger) 25.3 ± 8.4 35.8 ± 8.5
IQ 100.7 ± 8.2 87.1 ± 10.5*
Age first cocaine use - 23.8 ± 7.9
Total years of cocaine use - 16.3 ± 7.6
Years at current level - 10.7 ± 7.7

Value are expressed as group means ± standard deviation

*

Significant differences between groups are indicated (p<0.05)