Table 1 Demographic characteristics of the sample

From: Repeat variation in the human PER2 gene as a new genetic marker associated with cocaine addiction and brain dopamine D2 receptor availability

 

N

Male

Female

Healthy controls

Cocaine abusers

African Americans

286

208 (72.7%)

76 (26.6%)

174 (60.8%)

112 (39.3%)

Caucasians

154

115 (74.7%)

39 (25.3%)

128 (83.1%)

26 (16.9%)

Hispanics

61

39 (63.9%)

22 (36.1%)

51 (83.6%)

10 (16.4%)

Asians

8

3 (37.5%)

5 (62.5%)

7 (87.5%)

1 (12.5%)

 

509

 

509

  
  1. Values are shown in actual numbers and percentiles (within parenthesis).
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