Table 2 Diagnostic test characteristics for STIGA in calf serum
From: Determining the IgG concentrations in bovine colostrum and calf sera with a novel enzymatic assay
Cut point, OD 450 | Accuracy, % | Se, % | Sp, % | PPV, % | NPV, % |
|---|---|---|---|---|---|
Dairy calf serum | |||||
 0.2 | 91.6 | 77.8 | 98.2 | 95.5 | 90.2 |
 0.3 | 86.7 | 100.0 | 80.4 | 71.1 | 100.0 |
 0.4 | 67.5 | 100.0 | 51.8 | 50.0 | 100.0 |
 0.5 | 55.4 | 100.0 | 33.9 | 42.2 | 100.0 |
 0.6 | 45.8 | 100.0 | 19.6 | 37.5 | 100.0 |
 0.7 | 41.0 | 100.0 | 12.5 | 35.5 | 100.0 |
 0.8 | 34.9 | 100.0 | 3.6 | 33.3 | 100.0 |
Beef calf serum | |||||
 0.1 | 85.7 | 7.7 | 100.0 | 100.0 | 85.5 |
 0.2 | 90.5 | 38.5 | 100.0 | 100.0 | 102.9 |
 0.3 | 92.9 | 69.2 | 97.2 | 81.8 | 94.5 |
 0.4 | 83.9 | 100.0 | 91.5 | 46.4 | 116.1 |
 0.5 | 52.4 | 100.0 | 43.7 | 24.5 | 100.0 |
 0.6 | 31.0 | 100.0 | 18.3 | 18.3 | 100.0 |
 0.7 | 16.7 | 100.0 | 1.4 | 15.7 | 100.0 |