Table 2.
Proportion of positive tuberculin skin testing response stratified by the main collected variables.
| Variables | TST-positive result | % | P value |
|---|---|---|---|
| Gender | |||
| Male | 5/560 | 0.9 | 0.9 |
| Female | 6/742 | 0.8 | |
| Nationality | |||
| Italian | 4/1226 | 0.3 | <0.0001 |
| Foreign | 7/76 | 9.2 | |
| Born in a high TB incidence country* | |||
| No | 8/1281 | 0.6 | <0.0001 |
| Yes | 3/21 | 14.3 | |
| Year of attendance | |||
| First | 2/219 | 0.9 | 0.6 |
| Second | 2/287 | 0.7 | |
| Third | 0/186 | 0 | |
| Fourth | 4/262 | 1.5 | |
| Fifth | 1/183 | 0.5 | |
| Sixth | 2/165 | 1.2 | |
| Level of training | |||
| Preclinical | 4/692 | 0.6 | 0.3 |
| Clinical | 7/610 | 1.2 | |
| BCG immunization | |||
| No | 4/1255 | 0.3 | <0.0001 |
| Yes | 7/47 | 14.9 | |
| Previous professional exposure to active TB case | |||
| No | 9/1221 | 0.7 | 0.09 |
| Yes | 2/63 | 3.2 |
SD: standard deviation.
TB: tuberculosis.
BCG: Bacille Calmette-Guérin.
TST: tuberculin skin testing.
*High incidence: ≥20 cases per 100,000 population [12].