Demographics | Recruited in the cohort study | P value | ||
---|---|---|---|---|
 |  | Yes (N = 270) | No (N = 467) |  |
Age (years) | 16-20 | 76 (28.2) | 149 (31.9) | 0.0388 |
 | 21-25 | 84 (31.1) | 171 (36.6) |  |
 | 26-52 | 110 (40.7) | 147 (31.5) |  |
Nationality | Han | 190 (70.4) | 302 (64.7) | 0.1134 |
 | Other | 80 (29.6) | 165 (35.3) |  |
Registered permanent residence | Kaiyuan city | 123 (45.6) | 174 (37.3) | 0.0826 |
 | Other cities in Yunnan | 100 (37.0) | 195 (41.7) |  |
 | Outside Yunnan | 47 (17.4) | 98 (21.0) |  |
Education level | < 9 years | 133 (49.3) | 254 (54.4) | 0.1790 |
 | ≥9 years | 137 (50.7) | 213 (45.6) |  |
Marital status | Married or cohabitation | 85 (31.5) | 140 (30.0) | 0.6695 |
 | Single, separated, divorced, or widowed | 185 (68.5) | 327 (70.0) |  |
Earnings per sex | ≤$7 | 44 (16.3) | 65 (13.9) | 0.6586 |
 | $7~$14 | 128 (47.4) | 232 (49.7) |  |
 | > $14 | 98 (36.3) | 170 (36.4) |  |
Entertainment venue | Lower risk | 163 (60.4) | 295 (63.2) | 0.4504 |
 | Higher risk | 107 (39.6) | 172 (36.8) |  |
Drug use (ever)* | Non-drug user | 207 (76.7) | 410 (87.8) | < .0001 |
 | Non-injection illegal drug user | 22 (8.2) | 29 (6.2) |  |
 | Injection drug user | 41 (15.2) | 28 (6.0) |  |
HIV* | Negative | 223 (82.6) | 438 (93.8) | < .0001 |
 | Positive | 47 (17.4) | 29 (6.2) |  |
Syphilis | Negative | 246 (91.1) | 436 (93.4) | 0.2626 |
 | Positive | 24 (8.9) | 31 (6.6) |  |
N. gonorrhoeae | Negative | 247 (91.5) | 429 (91.9) | 0.8563 |
 | Positive | 23 (8.5) | 38 (8.1) |  |
C. trachomatis | Negative | 206 (76.3) | 340 (72.8) | 0.2973 |
 | Positive | 64 (23.7) | 127 (27.2) |  |
T. vaginalis | Negative | 241 (89.3) | 418 (89.5) | 0.9159 |
 | Positive | 29 (10.7) | 49 (10.5) |  |
HSV-2 | Negative | 75 (27.8) | 160 (34.3) | 0.0688 |
 | Positive | 195 (72.2) | 307 (65.7) |  |