Table 1 Demographic characteristics of the participants and the results of the univariate analysis of demographic characteristics and HIV seroconversion.
| Â | All n (%) | HIV seroconversion | P value | |
|---|---|---|---|---|
Yes | No | |||
n (%) | n (%) | |||
Age (years) | 0.91 | |||
 18–26 | 954 (49.3) | 17 (46.0) | 937 (49.3) |  |
 27–36 | 775 (40.0) | 16 (43.2) | 759 (40.0) |  |
 37–60 | 208 (10.7) | 4 (10.8) | 204 (10.7) |  |
Education level | 0.15 | |||
 High school or below | 253 (13.1) | 7 (18.9) | 246 (13.0) |  |
 College & undergraduate | 1304 (67.3) | 27 (73.0) | 1277 (67.2) |  |
 Postgraduate | 380 (19.6) | 3 (8.1) | 377 (19.8) |  |
Duration of residence in Beijing | 0.47 | |||
 < 6 months | 169 (8.7) | 5 (13.5) | 164 (8.6) |  |
 6–11 months | 132 (6.8) | 1 (2.7) | 131 (6.9) |  |
 12–23 months | 877 (45.3) | 17 (46.0) | 860 (45.3) |  |
 24 months or more | 590 (30.5) | 9 (24.3) | 581 (30.6) |  |
 Local resident | 169 (8.7) | 5 (13.5) | 164 (8.6) |  |
Occupation* | 0.07 | |||
 Workers | 44 (2.3) | 1 (2.7) | 43 (2.3) |  |
 Service sector | 105 (5.4) | 2 (5.4) | 103 (5.4) |  |
 Civil servants | 154 (8.0) | 1 (2.7) | 153 (8.1) |  |
 Students | 186 (9.6) | 3 (8.1) | 183 (9.6) |  |
 Company employees | 471 (24.3) | 3 (8.1) | 468 (24.6) |  |
 Freelancers | 116 (6.0) | 4 (10.8) | 112 (5.9) |  |
 Other | 861 (44.4) | 23 (62.2) | 838 (44.1) |  |