TABLE 1.
DEMOGRAPHIC CHARACTERISTICS OF STUDY PARTICIPANTS BY HIV STATUS (N = 1,955)
| HIV-uninfected (N = 1,388) |
HIV-infected (N = 567) |
||||
|---|---|---|---|---|---|
| Demographic Variable | N | % | N | % | P Value |
| Age group, years | |||||
| <30 | 70 | 5.0 | 41 | 7.2 | 0.001 |
| 30–39 | 470 | 33.9 | 234 | 41.3 | |
| 40–49 | 632 | 45.5 | 226 | 39.9 | |
| ≥50 | 216 | 15.6 | 66 | 11.6 | |
| Employment duration, yr | |||||
| <10 | 206 | 14.8 | 115 | 20.3 | <0.001 |
| 10–19 | 457 | 32.9 | 220 | 38.8 | |
| 20–29 | 559 | 40.3 | 176 | 31.0 | |
| ≥30 | 166 | 12.0 | 56 | 9.9 | |
| Country of origin | |||||
| South African | 729 | 52.5 | 250 | 44.1 | 0.001 |
| Non–South African | 659 | 47.5 | 317 | 55.9 | |
| Residence | |||||
| Non-hostel | 370 | 26.7 | 122 | 21.5 | 0.019 |
| Hostel | 1,018 | 73.3 | 445 | 78.5 | |
| Place of Work | |||||
| Surface | 93 | 6.7 | 43 | 7.6 | 0.494 |
| Underground | 1,295 | 93.3 | 524 | 92.4 | |
| Silicosis | |||||
| Absent | 1,002 | 72.2 | 416 | 73.4 | 0.751 |
| Early | 256 | 18.4 | 106 | 18.7 | |
| Advanced | 103 | 7.4 | 34 | 6.0 | |
| Missing | 27 | 1.9 | 11 | 1.9 | |
| Previous tuberculosis | |||||
| No | 1,280 | 92.2 | 484 | 85.4 | <0.001 |
| Yes |
108 |
7.8 |
83 |
14.6 |
|
P values are from a Fisher exact test for differences in characteristics by HIV status. Silicosis categories were: absent (International Labour Organization [ILO] grade: 0/0), early (ILO grade: 0/1 or 1/0), or advanced (ILO grade: 1/1, 2/2 or 3/3).