Table 1.
The main demographic and epidemiological characteristics of the study population
| Phase 1 n | (%) | Phase 2 n | (%) | |
|---|---|---|---|---|
| Total number of participants | 114 | - | 100 | 92 |
| Mean age, years (SD) | 26.7 (0.1) | - | 26.5 (0.1) | - |
| Gender | ||||
| Male | 38 | 33.3 | 32 | 32 |
| Female | 76 | 66.7 | 68 | 68 |
| BCG immunization | 114 | 100 | 100 | 100 |
| Tobacco smoking | 8 | 7 | 8 | 8 |
| Alcohol | 16 | 14.4 | 15 | 15 |
| Medical history (asthma, hypothyroidism, rhinitis, anemia, duodenal ulcer) | 17 | 14.9 | 16 | 16 |
| Level for training | ||||
| First year | 52 | 45.6 | 49 | 49 |
| Second year | 62 | 54.4 | 51 | 51 |
| Risk areas | ||||
| Low risk areas | 41 | 36 | 38 | 38 |
| High risk areas | 73 | 64 | 62 | 62 |
| Previous exposure to active TB | ||||
| NO | 67 | 63.2 | 63 | 65 |
| Household | 1 | 1 | 1 | 1 |
| Professional | 38 | 35.8 | 33 | 34 |
| Recent professionnal exposure (during the study) | ||||
| TST result | 61 | 61 | ||
| Negative < 5mm | 65 | 57 | 46 | 46 |
| Intermediate [5–9mm] | 19 | 16.7 | 24 | 24 |
| Positive≥10mm | 30 | 26.3 | 30 | 30 |
| Average TST mm [95%CI] | 5,3 [3,8 – 6.6] | 6.1 [4.8–7.3] | ||
SD: Standard Deviation; TST: Tuberculin Skin Test; 95%CI: 95% Confidence Interval