Table 2.
Tuberculin skin test (TST) conversions and tuberculosis (TB) incidence in 8 male and 4 female Brazilian prisons (N = 1,422)
| Variables | Prisons | ||
|---|---|---|---|
| Male | Female | Total | |
| Capacity | 2,469 | 451 | 2,920 |
| Inmate population | 6,552 | 669 | 7,221 |
| Individuals enrolled at baseline | 2,861 | 519 | 3,380 |
| Individuals followed for 1 year | 1,235 | 187 | 1,422 |
| TST-negative subjects | 905 | 155 | 1,060 |
| TST converted subjects | 256 | 16 | 272 |
| TST conversion rate, %a | 28 (25–32) | 10 (6–17) | 26 (23–29) |
| Incident cases reported between screenings | 17 | 1 | 18 |
| TB cases at 1st screening | 10 | 0 | 10 |
| TB cases at 2nd screening | 7 | 0 | 7 |
| TB incidence, %a,b | 1.39 (0.81–2.22) | 0.53 (0.01–2.98) | 1.27 (0.76–2.02) |
Abbreviations: TB tuberculosis; TST tuberculin skin test
aPercentage and 95 % confidence interval
bCases identified between screenings or at second screening as a proportion of individuals followed for 1 year