The basic information of the 2606 FSWs, persons with IDU, PW, STUs and subjects undergoing VCT in the sample
| Variables | Subgroups | The sample sizes of each population group (n (%)) | Total | ||||
| FSWs | Persons with IDU | PW | STUs | Subjects undergoing VCT | |||
| Sex | Male | 0 (0) | 256 (84.2) | 0 (0) | 255 (25.5) | 48 (48.0) | 559 |
| Female | 202(100) | 48 (15.8) | 1000(100) | 745 (74.5) | 52 (52.0) | 2047 | |
| Age | <20 | 1 (0.5) | 2 (0.7) | 38 (3.8) | 846 (84.6) | 2 (2.0) | 889 |
| 20–29 | 12 (5.9) | 16 (5.3) | 524 (52.4) | 113 (11.3) | 57 (57.0) | 722 | |
| 30–39 | 68 (33.7) | 126 (41.4) | 417 (41.7) | 41 (4.1) | 18 (18.0) | 670 | |
| ≥40 | 121 (59.9) | 160 (52.6) | 21 (2.1) | 0 (0) | 23 (23.0) | 325 | |
| Ethnicity | Han | 120 (59.4) | 279 (91.8) | 692 (69.2) | 526 (52.6) | 56 (56.0) | 1673 |
| Zhuang | 58 (28.7) | 20 (6.6) | 281 (28.1) | 402 (40.2) | 40 (40.0) | 801 | |
| Other | 24 (11.9) | 5 (1.6) | 27 (2.7) | 72 (7.2) | 4 (4.0) | 132 | |
| Education level | Illiterate | 33 (16.3) | 5 (1.6) | 1 (0.1) | 0 (0) | 1 (1.0) | 40 |
| Primary school | 94 (46.5) | 54 (17.8) | 40(4) | 0 (0) | 8 (8.0) | 196 | |
| Junior middle school | 69 (34.2) | 217 (71.4) | 471 (47.1) | 0 (0) | 18 (18.0) | 775 | |
| Senior high school | 6 (3) | 28 (9.2) | 193 (19.3) | 472 (47.2) | 19 (19.0) | 718 | |
| Junior college | 0 (0) | 0 (0) | 292 (29.2) | 527 (52.7) | 54 (54.0) | 873 | |
| Bachelor’s degree or above | 0 (0) | 0 (0) | 3 (0.3) | 1 (0.1) | 0 (0) | 4 | |
| Total | 202 | 304 | 1000 | 1000 | 100 | 2606 | |
FSWs, female sex workers; IDU, injection drug use; PW, pregnant women; STUs, students enrolled in tertiary institutions; VCT, voluntary HIV counselling and testing.