| METHOD | SENSITIVITY | SPECIFICITY | POSITIVE PREDICTIVE VALUE | NEGATIVE PREDICTIVE VALUE |
| % (CI 95%) | % (CI 95%) | % (CI 95%) | % (CI 95%) | |
| HC | 83.9 (66.3 - 94.6) | 89.7 (88.5 - 90.8) | 7.9 (5.2 - 11.4) | 99.8 (99.6 - 99.9) |
| COBAS | 83.9 (66.3 - 94.6) | 88.7 (87.4 - 89.8) | 7.5 (5.0 - 10.9) | 99.8 (99.5 - 99.9) |