Table 2.
QIAreach, QFT-Plus and TST results.
| Total, n (%) | TST (5 mm) positive, n (%) | TST (5 mm) negative, n (%) | p-value¥ | TST (10 mm) positive, n (%) | TST (10 mm) negative, n (%) | p-value¥ | |
|---|---|---|---|---|---|---|---|
| QIAreach | 200 (100.0) | ||||||
| Positive | 84 (42.0) | 33 (39.3) | 51 (60.7) | < 0.001 | 16 (19.1) | 68 (81.0) | < 0.001 |
| Negative | 116 (58.0) | 19 (16.4) | 97 (83.6) | 7 (6.0) | 109 (94.0) | ||
| QFT-Plus | 200 (100.0) | ||||||
| Positive | 47 (23.5) | 25 (53.2) | 22 (46.8) | 0.475 | 15 (31.9) | 32 (68.1) | < 0.001 |
| Negative | 153 (76.5) | 27 (17.7) | 126 (82.4) | 8 (5.2) | 145 (94.8) |
Contingency tables of QIAreach and TST results compared to the reference standard. TST results were presented at 5 mm and 10 mm induration thresholds. Chi-squared tests were used to calculate p-values; p < 0.05 was considered statistically significant.
¥McNemar’s test used to compare QIAreach and QFT-Plus with TST at a threshold of 5 mm and 10 mm.