| Characteristics | Total (%) |
| Heath care facility | |
| tertiary hospital (hospital A) | 801 (60.4) |
| secondary hospital (hospital B) | 525 (39.6) |
| Age range, years |
|
| 20 - 29 | 606 (45.7) |
| 30 - 39 | 362 (27.3) |
| 40 - 49 | 219 (16.5) |
| ≥50 | 139 (10.5) |
| Gender | |
| Female | 980 (73.9) |
| Male | 346 (26.1) |
| Years working in hospital | |
| <11 | 908 (68.5) |
| 11 - 20 | 174 (13.1) |
| 21 - 30 | 179 (13.5) |
| >30 | 65 (4.9) |
| Latent tuberculosis infection | |
| No | 1091 (82.3) |
| Yes | 235 (17.7) |
| Profession | |
| Doctors | 189 (14.3) |
| Nurses | 801 (60.4) |
| Nursing assistants, paramedics | 130 (9.8) |
| Lab workers | 55 (4.1) |
| Others, including clerks | 151 (11.4) |
| Risk classification | |
| Group 1 | 300 (22.6) |
| Group 2 | 233 (17.6) |
| Group 3 | 633 (47.7) |
| Group 4 | 160 (12.1) |