From: Occupational risk of tuberculosis transmission in a low incidence area
Variable | Non-clustered TB | Clustered TB | Crude OR | 95% CI | Adj. ORb | 95% CI | ||
---|---|---|---|---|---|---|---|---|
N a | % | N a | % | |||||
Health-care worker | ||||||||
No | 545 | 99.6 | 269 | 97.1 | 1.0 | - | 1.0 | - |
Yes | 2 | 0.4 | 8 | 2.9 | 8.1 | 1.7–38.4 | 17.9 | 3.6–89.3 |
AIDS | ||||||||
No | 520 | 95.1 | 256 | 92.4 | 1.0 | - | 1.0 | - |
Yes | 27 | 4.9 | 21 | 7.6 | 1.6 | 0.9–2.8 | 0.8 | 0.4–1.8 |
Foreign-born | ||||||||
No | 284 | 51.9 | 185 | 66.8 | 1.0 | - | 1.0 | - |
Yes | 263 | 48.1 | 92 | 33.2 | 0.5 | 0.4–0.7 | 0.5 | 0.3–0.7 |
Sex | ||||||||
Female | 221 | 40.4 | 90 | 32.5 | 1.0 | - | 1.0 | - |
Male | 326 | 59.6 | 187 | 67.5 | 1.4 | 1.0–1.9 | 1.1 | 0.8–1.6 |
Drug abuse | ||||||||
No | 517 | 94.5 | 237 | 85.6 | 1.0 | - | 1.0 | - |
Yes | 30 | 5.5 | 40 | 14.4 | 2.9 | 1.8–4.8 | 1.7 | 1.0–3.1 |
Alcohol abuse | ||||||||
No | 468 | 85.6 | 164 | 59.2 | 1.0 | - | 1.0 | - |
Yes | 79 | 14.4 | 113 | 40.8 | 4.1 | 2.9–5.7 | 2.6 | 1.7–3.8 |
Homelessness | ||||||||
No | 510 | 93.2 | 249 | 89.9 | 1.0 | - | 1.0 | - |
Yes | 37 | 6.8 | 28 | 10.1 | 1.6 | 0.9–2.6 | 0.9 | 0.5–1.7 |
History of contact tracing | ||||||||
No | 505 | 92.3 | 211 | 76.2 | 1.0 | - | 1.0 | - |
Yes | 42 | 7.7 | 66 | 23.8 | 3.8 | 2.5–5.7 | 2.8 | 1.7–4.6 |
Sputum smear positivity | ||||||||
No | 377 | 68.9 | 161 | 58.1 | 1.0 | - | 1.0 | - |
Yes | 170 | 31.1 | 116 | 41.9 | 1.6 | 1.2–2.2 | 1.2 | 0.9–1.8 |
Previous history of TB | ||||||||
No | 485 | 88.7 | 234 | 84.5 | 1.0 | - | 1.0 | - |
Yes | 62 | 11.3 | 43 | 15.5 | 1.4 | 0.9–2.2 | 1.7 | 1.0–2.7 |
Unemployment | ||||||||
No | 441 | 80.6 | 114 | 41.2 | 1.0 | - | 1.0 | - |
Yes | 106 | 19.4 | 163 | 58.8 | 5.9 | 4.3–8.2 | 5.2 | 3.6–7.5 |
Latency period from first symptoms to TB diagnosis | ||||||||
< 6 months | 432 | 79.0 | 156 | 56.3 | 1.0 | - | 1.0 | - |
≥ 6 months; <12 months | 95 | 17.4 | 78 | 28.2 | 2.3 | 1.6–3.2 | 6.0 | 3.4–10.4 |
≥ 12 months | 20 | 3.7 | 43 | 15.5 | 2.6 | 1.7–3.8 | 7.5 | 3.7–13.9 |