TABLE 7.
Contingency table between anti-HBs in-house assay and the AUSAB RIA with different cutoffsa
| Antibody concn cutoff (mIU/ml) | Agreement (95% CI) | Sensitivity (95% CI) | Specificity (95% CI) | Kappa | McNemar P valueb |
|---|---|---|---|---|---|
| 2 | 97.71 (96.53-98.58) | 99.02 (98.08-99.58) | 87.13 (79.00-92.96) | 0.881 (0.830-0.931) | 0.3833 |
| 2.6 | 97.82 (96.66-98.67) | 98.53 (97.45-99.24) | 92.08 (84.99-96.52) | 0.891 (0.843-0.938) | 0.5034 |
| 3.3 | 97.61 (96.40-98.49) | 98.04 (96.84-98.88) | 94.06 (87.52-97.79) | 0.883 (0.835-0.931) | 0.0525 |
| 3.9 | 96.74 (95.37-97.79) | 96.94 (95.52-98.01) | 95.05 (88.82-98.37) | 0.847 (0.793-0.900) | 0.0003 |
a
n = 919.
b
Test of dissymmetry in concordance.