Table 2 Characteristics of participants in TB-positive and TB-negative groups according to results of tuberculin skin test
| Â | Positive | Negative | P value |
|---|---|---|---|
n = 170 | n = 129 | ||
Demographics | |||
 Sex-male, n (%) | 40 (23.5) | 30 (23.3) | 1.000* |
Age- n (%), y | Â | Â | 0.978* |
 ≤ 29 | 53 (31.2) | 40 (31.0) |  |
 30–39 | 69 (40.6) | 51 (39.5) |  |
 ≥ 40 | 48 (28.2) | 38 (29.5) |  |
Health professionals, n (%) | Â | Â | 0.766* |
 Physician | 45 (26.5) | 35 (27.1) |  |
 Nurse | 109 (64.1) | 85 (65.9) |  |
 Others | 16 (9.4) | 9 (7.0) |  |
Department, n (%) | Â | Â | <0.001* |
 Respiratory Center | 16 (9.4) | 32 (24.8) |  |
 Emergency | 49 (28.8) | 22 (17.1) |  |
 Infectious Diseases | 16 (9.4) | 3 (2.3) |  |
 Nephrology | 13 (7.6) | 28 (21.7) |  |
 Hematology | 36 (21.2) | 7 (5.4) |  |
 Out patients | 23 (13.5) | 19 (14.7) |  |
 Others | 17 (10.0) | 18 (14.0) |  |
Years for working experiences as current profession-mean (SD), yr. | 9.7 (9.7) | 10.3 (7.0) | 0.469‡ |
History of TB disease, n (%) | |||
 Personal history (n = 292) | 0 (0.0) | 3 (2.4) | 0.077†|
 Family history (n = 289) | 4 (2.4)) | 2 (1.6) | 0.702†|
Record of past BCG (n = 298) | 83 (49.1) | 36 (27.9) | <0.001* |
Record of past TST (n = 295) | 165 (98.2) | 122 (96.1) | 0.297* |
Possibility of exposure with TB patients | Â | Â | <0.001* |
 Yes | 100 (58.8) | 97 (77.0) |  |
 No | 36 (21.2) | 4 (3.2) |  |
 Do not know | 34 (20.0) | 25 (19.8) |  |