| Characteristic | Negative for HLA-B*57 | Positive for HLA-B*57 | Positive for HLA-B*5701 | p Value* | |
| 1) Sex-n (%) | |||||
| Male | 205 (53.2) | 47 (45.6) | 17 (58.6) | 0.19 | |
| Female | 180 (46.8) | 56 (54.4) | 12 (41.4) | ||
| 2) Age-yr | |||||
| Mean | 40.7 | 40.0 | 41.4 | 0.7 | |
| DP | 11.7 | 11.4 | 11.5 | ||
| Average | 40.0 | 38.0 | 40.0 | ||
| 3) Ethnic group-n (%) | |||||
| Caucasian | 242(62.9) | 64 (62.1) | 15 (51.7) | ||
| Black | 99 (25.7) | 28 (27.2) | 5 (17.2) | ||
| Other | 44 (11.4) | 11 (10.7) | 9 (31.1) | ||
| 4) Risk category n (%) | |||||
| Injection drug use | 74 (23) | 41(25.1) | 9 (27.2) | ||
| Homosexuals risk | 98 (30.5) | 57 (35.0) | 13 (39.5) | ||
| Transfusion risk | 29 (9.1) | 22 (13.5) | 5 (15.2) | ||
| Risk not unidentified | 120 (37.4) | 43 (26.4) | 6 (18.1) | ||