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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Drug Alcohol Depend. 2011 Oct 29;122(3):228–235. doi: 10.1016/j.drugalcdep.2011.10.002

Table 1. Sample Characteristics.

SD: Standard Deviation; %: Percent of group, N: number of subjects, SUD: substance use disorder patient group, HC: healthy control group. Asterisks indicate statistically significant (p<0.05) differences between the healthy control and patient groups.

Demographics SUD HC
     Total N (Female N) 12 (5) 12 (7)
     Age, mean years (SD) 37.2 (9.5) 31.0 (8.6)
Race/ Ethnicity % (N)
     White 25.0 (3) 75.0 (9)
     Black 50.0 (6) 16.7 (2)
     Asian 25.0 (3) 8.3 (1)
     Hispanic ethnicity 25.0 (3) 8.3 (1)
Education Level % (N)
     Partial High School 25.0 (3) 0.0 (0)
     High School Completed 41.7 (5) 16.7 (2)
     Partial College 25.0 (3) 33.3 (4)
     College Completed 8.3 (1) 50.0 (6)
     Shipley IQ mean (SD) * 86.3 (14.3) 101.1 (11.1)
     Days between fMRI Sessions* 84.4 (41.5) 137.4 (29.4)