Table 6. Comparison of apparent error rates (%) generated by using calculated ROC cutoffs and cutoffs of 2.
| IgM | IgG | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| V/N | P/N | V/N | P/N | |||||||
| Virus | Calc. cutoff | Cutoff=2 | Calc. cutoff | Cutoff=2 | N IgM | Calc. cutoff | Cutoff=2 | Calc. cutoff | Cutoff=2 | N Igg |
| CHIK | 1.5* (1.1**) | 2 | 4.5 (2.4) | 4.5 | 61 | 0.0 (3.7) | 0 | 1.7 (3.9) | 10 | 47 |
| DEN | 5.6 (5.4) | 20.7 | 4.4 (5.0) | 7.8 | 89 | 4.6 (10.6) | 24.9 | 14.9 (4.9) | 23.2 | 73 |
| EEE | 2.6 (1.0) | 0.9 | 6.7 (2.1) | 6.7 | 36 | 0.3 (2.2) | 0.6 | 1.8 (3.1) | 4.7 | 39 |
| JE | 2.7 (2.9) | 2.4 | 3.0 (5.9) | 6.5 | 30 | 3.7 (2.6) | 4.9 | 6.2 (9.5) | 24.1 | 29 |
| LAC | 6.5 (1.9) | 6.2 | 10.3 (3.0) | 17 | 78 | 4.5 (2.9) | 5.8 | 11.2 (4.2) | 34 | 44 |
| MAY | 0.0 (14.5) | 27.3 | 0.0 (6.7) | 6.3 | 7 | 0.0 (9.1) | 37.4 | 0.0 (4.2) | 7.2 | 5 |
| POW | 0.3 (3.7) | 5.8 | 0.9 (11.5) | 10.4 | 22 | 0.6 (18.6) | 6.9 | 1.9 (13.0) | 28.9 | 16 |
| RR | 1.1 (5.0) | 41.1 | 12.2 (1.3) | 7.8 | 8 | 0.0 (6.3) | 42.3 | 1.0 (3.1) | 3.6 | 6 |
| SLE | 1.7 (4.1) | 5.8 | 1.1 (11.2) | 12.7 | 56 | 3.3 (3.8) | 8.8 | 3.3 (13.0) | 38.5 | 61 |
| VEE | 16.5 (1.8) | 9.5 | 3.2 (1.9) | 3.2 | 6 | 0.0 (4.2) | 2.7 | 1.3 (2.8) | 5.3 | 16 |
| WN | 0.9 (9.8) | 5.7 | 2.2 (2.8) | 2.8 | 93 | 1.8 (7.8) | 9.8 | 3.0 (13.4) | 16.3 | 104 |
| YF | 14.5 (2.4) | 16 | 9.9 (2.1) | 10.6 | 101 | 5.3 (5.9) | 14.1 | 5.3 (11.3) | 24.2 | 59 |
| Total*** | 5 | 3 | 3+1 tied | 1 tied | 10+3 tied | 0 | 3 tied | 0 |
* Lowest error rate per test shown in bold
**
Calculated cutoff value
***
Total lowest error rate for each method of cutoff calculation