Characteristics of groups studied
| Groups | No. of cases | No. of men | Mean (SD) age (years) | No. PPD positive |
|---|---|---|---|---|
| HC PPD negative | 44 | 20 | 41.2 (11.3) | 0 |
| HC PPD positive | 44 | 25 | 40.1 (11.7) | 44 |
| N-TB | 44 | 23 | 42.5 (10.6) | 5 |
| hTB | 24 | 11 | 46.5 (8.6) | 23 |
| EpTB | 42 | 18 | 41.4 (13.7) | 20 |
HC = healthy controls; N-TB = non-tuberculous disease; hTB = healed pulmonary (n=15) or extrapulmonary (n=9) tuberculosis; EpTB = extrapulmonary tuberculosis.