Table 2 Risk factors of latent tuberculosis infection (LTBI) among 2153 health care workers
Variable | HCW N (%) | Induration ≥ 10 mm n (%) | Crude OR (95% CI) | Adjusted OR* (95% CI) | |||
|---|---|---|---|---|---|---|---|
Gender and smoking | Male, non-smoker | 526 (24.4) | 253 (48.1) | 1 | Â | Â | Â |
| Â | Male, smoker | 464 (21.6) | 244 (52.6) | 1.2 | (0.9-1.5) | Â | Â |
| Â | Female | 1163 (54.0) | 609 (52.4) | 1.2 | (0.9-1.5) | Â | Â |
Age group (years) | 18-29 | 580 (26.9) | 229 (39.5) | 1 | Â | 1 | Â |
| Â | 30-39 | 740 (34.4) | 399 (53.9) | 1.8 | (1.4-2.2) | 1.6 | (1.2-2.1) |
| Â | 40-49 | 615 (28.6) | 343 (55.8) | 1.9 | (1.5-2.4) | 1.8 | (1.3-2.5) |
|  | ≥ 50 | 218 (10.1) | 135 (61.9) | 2.5 | (1.8-3.4) | 2.6 | (1.7-4.0) |
BCG scar | No | 1376 (63.9) | 674 (49.0) | 1 | Â | 1 | Â |
| Â | Yes | 777 (36.1) | 472 (55.6) | 1.3 | (1.1-1.6) | 1.4 | (1.1-1.7) |
Income (Yuan/Year) | < 15000 | 1106 (51.4) | 528 (47.7) | 1 | Â | Â | Â |
| Â | 15000-19999 | 691 (32.1) | 361 (52.2) | 1.2 | (1.0-1.5) | Â | Â |
| Â | 20000-29999 | 298 (13.8) | 182 (61.1) | 1.7 | (1.3-2.2) | Â | Â |
| Â | > 30000 | 58 (2.7) | 35 (60.3) | 1.7 | (1.0-2.9) | Â | Â |
Education | Primary or middle school | 63 (2.9) | 28 (44.4) | 1 | Â | Â | Â |
| Â | Secondary school | 976 (45.3) | 450 (46.1) | 1.1 | (0.6-1.8) | Â | Â |
| Â | Junior college | 898 (41.7) | 496 (55.2) | 1.5 | (0.9-2.6) | Â | Â |
| Â | University or above | 216 (10.1) | 132 (61.1) | 2.0 | (1.1-3.5) | Â | Â |
Position | Junior | 1270 (59.0) | 594 (46.8) | 1 | Â | Â | Â |
| Â | Middle | 697 (32.4) | 414 (59.4) | 1.7 | (1.4-2.0) | Â | Â |
| Â | Senior | 186 (8.6) | 98 (52.7) | 1.3 | (0.9-1.7) | Â | Â |
Job location | Administrative/logistic | 698 (32.4) | 295 (42.3) | 1 | Â | 1 | Â |
| Â | TB outpatient clinic | 609 (28.3) | 333 (54.7) | 1.7 | (1.3-2.1) | 1.9 | (1.4-2.6) |
| Â | TB inpatient ward | 165 (7.7) | 101 (61.2) | 2.2 | (1.5-3.1) | 1.3 | (1.0-2.1) |
| Â | Supervision and monitoring | 234 (10.9) | 132 (56.4) | 1.8 | (1.3-2.4) | 1.6 | (1.2-2.3) |
| Â | Pharmacy | 147 (6.8) | 74 (50.3) | 1.4 | (1.0-2.0) | 1.0 | (0.7-1.6) |
| Â | X-ray department | 122 (5.6) | 78 (63.9) | 2.4 | (1.6-3.6) | 1.8 | (1.1-2.9) |
| Â | Laboratory | 178 (8.3) | 93 (52.2) | 1.5 | (1.1-2.1) | 1.4 | (0.9-2.0) |
Duration of employment (years) | < 1 | 810 (37.6) | 295 (36.4) | 1 | Â | 1 | Â |
| Â | 1-4 | 374 (17.4) | 166 (44.4) | 1.4 | (1.1-1.8) | 1.4 | (1.0-1.9) |
| Â | 5-9 | 323 (15.0) | 188 (58.2) | 2.4 | (1.9-3.2) | 2.3 | (1.6-3.1) |
|  | ≥ 10 | 646 (30.0) | 457 (70.7) | 4.2 | (3.4-5.3) | 3.0 | (2.2-4.1) |
Inpatient ward | No | 1094 (50.8) | 436 (39.9) | 1 | Â | 1 | Â |
| Â | Yes | 1059 (49.2) | 670 (63.3) | 2.6 | (2.2-3.1) | 2.3 | (1.9-2.9) |
Size of clinic (No. of staff) | < 25 | 348 (16.2) | 179 (51.4) | 1 | Â | Â | Â |
| Â | 25-39 | 600 (27.9) | 268 (44.7) | 0.8 | (0.6-0.9) | Â | Â |
|  | ≥ 40 | 1205 (56.0) | 659 (54.7) | 1.1 | (0.9-1.5) |  |  |
Level | County/District | 1282 (59.6) | 538 (42.0) | 1 | Â | 1 | Â |
| Â | Prefecture | 871 (40.4) | 568 (65.2) | 2.8 | (2.3-3.3) | 1.8 | (1.0-3.5) |