Agreement between reader 1 and reader 2: agreement and Cohen’s κ values (per type of specimen)
| Agreement (%) | Expected (%) | κ | 95% CI | Z | Prob>Z | |||
| Serum | Bioline | TREP | 99.30 | 81.77 | 0.96 | 0.91 to 1.00 | 16.27 | 0.00 |
| Chembio | TREP | 99.51 | 85.06 | 0.97 | 0.90 to 1.00 | 13.79 | 0.00 | |
| Non-TREP | 99.50 | 91.94 | 0.94 | 0.82 to 1.00 | 13.37 | 0.00 | ||
| Blood | Bioline | TREP | 98.96 | 88.02 | 0.91 | 0.82 to 1.00 | 15.53 | 0.00 |
| Chembio | TREP | 99.56 | 84.91 | 0.97 | 0.91 to 1.00 | 14.56 | 0.00 | |
| Non-TREP | 99.56 | 93.58 | 0.93 | 0.80 to 1.00 | 14.03 | 0.00 |