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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Drug Alcohol Depend. 2015 Apr 2;151:220–227. doi: 10.1016/j.drugalcdep.2015.03.021

Table 1.

Demographics and clinical characteristics of cocaine dependent (CD) and healthy control (HC) subjects

Subject characteristic CD (n=51) HC (n=57) p-value
Age (years) 38.5 ± 7.9 37.3 ± 9.9 0.51*
Years of Education 11.8 ± 1.6 14.7 ± 2.8 3e-08*
Gender (M/F) 37/14 32/25 0.08^
Beck Depression Inventory (BDI) 13.9 ± 7.9 N/A N/A
STAI State 40.1 ± 9.7 N/A N/A
STAI Trait 41.9 ± 8.9 N/A N/A
CCQ-Brief score 18.8 ± 7.2 N/A N/A
Smoking Status (Yes/No) 34/17 20/37 0.001^
Years of alcohol use 15.2 ± 8.7 13.5 ± 15.3 0.50*
Days of drinking (prior month) 12.0 ± 8.7 3.6 ±5.3 1e-10*
Years of Marijuana use 10.0 ± 4.5 <1 1e-10*
Average amount of monthly cocaine use
(gm) in the prior year		 14.5 ± 20.6 N/A N/A
Days of cocaine use in the prior month 15.1 ± 8.1 N/A N/A
Years of cocaine use 15.7 ± 8.8 N/A N/A
Days abstinent prior to assessment 18.2 ± 6.1 N/A N/A

Note: values are mean ± S.D.; Symbols indicate the test applied in analysis:

*

two-tailed two-sample t test;

^

χ2 test; Days of cocaine/alcohol use pertain to use prior to admission.