Table 1. General Sample Characteristics.
| MSMs (n = 108) | Johns (n = 118) | FSWs (n = 1,083) | |||||
| n | % | n | % | n | % | ||
| Age | <20 | 2 | 1.9 | 0 | 0.0 | 5 | 0.5 |
| (yrs) | 20–29 | 46 | 42.6 | 41 | 34.7 | 723 | 66.8 |
| 30–39 | 43 | 39.8 | 51 | 43.2 | 288 | 26.6 | |
| ≥40 | 16 | 14.8 | 26 | 22.0 | 56 | 5.2 | |
| Missing | 1 | 0.9 | 0 | 0.0 | 11 | 1.0 | |
| Education | Elementary school or less | 0 | 0.0 | 0 | 0.0 | 18 | 1.7 |
| Middle school | 0 | 0.0 | 5 | 4.2 | 173 | 16.0 | |
| High school | 24 | 22.2 | 44 | 37.3 | 782 | 72.2 | |
| College or post-graduate | 83 | 76.9 | 69 | 58.5 | 95 | 8.8 | |
| Missing | 1 | 0.9 | 0 | 0.0 | 15 | 1.4 | |
| Number of | None | 3 | 2.8 | 0 | 0.0 | 69 | 6.4 |
| social | 1∼5 | 23 | 21.3 | 25 | 21.2 | 262 | 24.2 |
| relationships | 6∼10 | 23 | 21.3 | 23 | 19.5 | 292 | 27.0 |
| (person) | 11∼20 | 27 | 25.0 | 20 | 16.9 | 281 | 25.9 |
| 21∼30 | 17 | 15.7 | 20 | 16.9 | 101 | 9.3 | |
| >30 | 13 | 12.0 | 20 | 16.9 | 78 | 7.2 | |
| Missing | 2 | 1.9 | 10 | 8.5 | 0 | 0.0 | |
| Smoking | Two packs or more | 2 | 1.9 | 7 | 5.9 | 251 | 23.2 |
| (per day) | One pack | 25 | 23.1 | 58 | 49.2 | 581 | 53.6 |
| Half pack | 14 | 13.0 | 16 | 13.6 | 128 | 11.8 | |
| Half pack or less | 4 | 3.7 | 1 | 0.8 | 31 | 2.9 | |
| Don’t smoke | 62 | 57.4 | 36 | 30.5 | 85 | 7.8 | |
| Missing | 1 | 0.9 | 0 | 0.0 | 7 | 0.6 | |
| Drunken sex | Often | 9 | 8.3 | 27 | 22.9 | 39 | 3.6 |
| Usually | 47 | 43.5 | 65 | 55.1 | 223 | 20.6 | |
| Never | 51 | 47.2 | 26 | 22.0 | 803 | 74.1 | |
| Missing | 1 | 0.9 | 0 | 0.0 | 18 | 1.7 | |
| Age at first sex | <14 | 10 | 9.3 | 0 | 0.0 | 11 | 1.0 |
| (yrs) | 14∼17 | 18 | 16.7 | 22 | 18.6 | 357 | 33.0 |
| 18∼20 | 21 | 19.4 | 45 | 38.1 | 521 | 48.1 | |
| >20 | 57 | 52.8 | 50 | 42.5 | 143 | 13.2 | |
| Missing | 2 | 1.8 | 1 | 0.8 | 51 | 4.7 | |
| Number of | 0∼3 | 47 | 43.5 | 65 | 55.1 | 19 | 1.8 |
| sex partners | 4∼6 | 21 | 19.4 | 35 | 29.7 | 55 | 5.1 |
| (person) | 7∼10 | 11 | 10.2 | 12 | 10.2 | 170 | 15.7 |
| >10 | 17 | 15.7 | 6 | 5.1 | 718 | 66.3 | |
| Missing | 12 | 11.1 | 0 | 0.0 | 121 | 11.2 | |
| Bisexual | Never | 49 | 45.4 | NA | NA | ||
| relationships | Once or twice | 44 | 40.7 | ||||
| Frequently | 11 | 10.2 | |||||
| Missing | 4 | 3.7 | |||||
| Anxiety for | Very high | 8 | 7.4 | 3 | 2.5 | 87 | 8.0 |
| STDs infection | High | 34 | 31.5 | 28 | 23.7 | 408 | 37.7 |
| Low | 40 | 37.0 | 69 | 58.5 | 339 | 31.3 | |
| Very low | 24 | 22.2 | 18 | 15.3 | 232 | 21.4 | |
| Missing | 2 | 1.9 | 0 | 0.0 | 17 | 1.6 | |
| Self-efficacy | Very high | 32 | 29.6 | 57 | 48.3 | 227 | 21.0 |
| High | 44 | 40.7 | 53 | 45.0 | 528 | 48.8 | |
| Low | 19 | 17.6 | 7 | 5.9 | 291 | 26.9 | |
| Very low | 8 | 7.4 | 0 | 0.0 | 17 | 1.6 | |
| Missing | 5 | 4.6 | 1 | 0.8 | 20 | 1.8 | |
| STDs infection | Never | 65 | 60.2 | 61 | 51.7 | 650 | 60.0 |
| Ever | 43 | 39.8 | 57 | 48.3 | 432 | 39.9 | |
| Missing | 0 | 0.0 | 0 | 0.0 | 1 | 0.1 | |
| Condom use | Almost | 52 | 48.1 | 57 | 48.3 | 564 | 52.1 |
| Frequently | 21 | 19.4 | 7 | 5.9 | 273 | 25.2 | |
| Often | 14 | 13.0 | 20 | 17.0 | 209 | 19.3 | |
| Never | 1 | 0.9 | 33 | 28.0 | 10 | 0.9 | |
| Missing | 20 | 18.5 | 1 | 0.8 | 27 | 2.5 | |