Table 2. Characteristics of the categorical predictors in the SHCS database.
| 50 cps/ml | 400 cps/ml | ||||
| Categorical variables | frequency | (%) | frequency | (%) | |
| Gender | female | 562 | (25.72%) | 705 | (26.8%) |
| male | 1623 | (74.28%) | 1926 | (73.2%) | |
| AIDS | no | 1461 | (66.86%) | 1775 | (67.46%) |
| yes | 724 | (33.14%) | 856 | (32.54%) | |
| Transmission group | blood | 16 | (0.73%) | 27 | (1.03%) |
| heterosexual | 719 | (32.91%) | 881 | (33.49%) | |
| IDU | 491 | (22.47%) | 598 | (22.73%) | |
| male homosexual | 879 | (40.23%) | 1033 | (39.26%) | |
| mother-to-child | 12 | (0.55%) | 16 | (0.61%) | |
| others/unknown | 68 | (3.12%) | 76 | (2.88%) | |
| Ethnic Group | 9 | (0.41%) | 10 | (0.38%) | |
| asian | 41 | (1.88%) | 58 | (2.2%) | |
| black | 281 | (12.86%) | 347 | (13.19%) | |
| hispano american | 34 | (1.56%) | 46 | (1.75%) | |
| white | 1743 | (79.77%) | 2080 | (79.06%) | |
| unknown | 77 | (3.52%) | 90 | (3.42%) | |
| Adherence to treatment | low | 496 | (22.7%) | 610 | (23.19%) |
| high | 1586 | (72.59%) | 1899 | (72.18%) | |
| others/unknown | 103 | (4.71%) | 122 | (4.64%) | |