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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2014 Jul 17;143:74–80. doi: 10.1016/j.drugalcdep.2014.07.007

Table 1.

Demographic information of healthy control participants and cocaine-dependent patients

Healthy Control N=54 Cocaine Patients N=23 p value
Age, years (SD) 29.6 (10.1) 39.7 (8.1) < .001
Education, years (SD) 14.9 (1.7) 12.0 (1.9) < .001
Female, N (%) 22 (40.7%) 6 (26.1%) .22
Cigarette Smokers, N (%) 5 (9.3%) 19 (82.6%) < .01
Race/Ethnicity, N (%) < .01
 Caucasian 34 (63%) 7 (30.4%)
 African-American 14 (25.9%) 12 (52.2%)
 Hispanic 1 (1.9%) 2 (8.7%)
 Multiracial/Other 5 (9.2%) 2 (8.7%)

Data are presented as mean (standard deviation) or as N (percent), as indicated.