Positive skin test results with different antigens using > 10 mm as cut off point
| BCG (+) > 10mm/total (%) | BCG (–) > 10mm/total (%) | RR | 95% CI | p value | |
|---|---|---|---|---|---|
| 5 TU PPD18–21,23–25,28–35,37,38,40–42 (n=20) | 6660/26469 (25.2%) | 4388/23041 (19.0%) | 2.12 | 1.50 to 3.00 | <0.0001 |
| 2 TU RT23 26,27,36,39,43 (n=5) | 7199/33456 (21.5%) | 4208/41000 (10.3%) | 2.65 | 1.83 to 3.85 | <0.0001 |
| 1TU RT2322 (n=1) | 46/285 (16.1%) | 99/1746 (5.7%) | 2.85 | 2.05 to 3.95 | <0.0001 |