Table 5. Comparison of baseline IFNγ production by TB incident and non–incident HHCs in response to the antigens used.
| Antigen | Geometric Mean (CI 95%) | Geometric Mean (CI 95%) | % (n/n) | % (n/n) | χ2 † | |
| Incident | Non-incident | p value* | Incident | Non-incident | p value | |
| CFP | 562.7 (324.7–975.1) | 554.5 (515.3–596.7) | 0.958 | 87.9 (29/33) | 88.3 (1704/1929) | 0.935 |
| CFP-10 | 248.9 (133.9–462.6) | 188.8(174.4–204.4) | 0.278 | 78.8 (26/33) | 66.0 (1281/1940) | 0.124 |
| HspX | 19.2 (8.3–44.9) | 35.6 (32.3–39.1) | 0.009 | 33.3 (11/33) | 32.0 (611/1912) | 0.866 |
| Ag85A | 29.2 (12.5–68.0) | 34.5 (31.0–38.3) | 0.549 | 39.4 (13/33) | 30.1 (583/1940) | 0.246 |
*Student t - test.
†Chi-square (χ2) test.