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 colostrum | |||||
 0.6 | 75.0 | 11.8 | 100.0 | 100.0 | 74.1 |
 0.7 | 78.3 | 23.5 | 100.0 | 100.0 | 76.8 |
 0.8 | 85.0 | 47.1 | 100.0 | 100.0 | 82.7 |
 0.9 | 85.0 | 64.7 | 93.0 | 78.6 | 87.0 |
 1.0 | 78.3 | 76.5 | 79.1 | 59.1 | 89.5 |
 1.1 | 75.0 | 88.2 | 69.8 | 53.6 | 93.8 |
 1.2 | 68.3 | 94.1 | 58.1 | 47.1 | 96.2 |
Beef colostrum | |||||
 0.6 | 84.4 | 25.0 | 98.1 | 75.0 | 85.0 |
 0.7 | 90.6 | 66.7 | 96.2 | 80.0 | 92.6 |
 0.8 | 89.1 | 83.3 | 90.4 | 66.7 | 95.9 |
 0.9 | 79.7 | 100.0 | 75.0 | 48.0 | 100.0 |
 1.0 | 71.9 | 100.0 | 65.4 | 40.0 | 100.0 |
 1.1 | 53.1 | 100.0 | 42.3 | 28.6 | 100.0 |
 1.2 | 42.2 | 100.0 | 28.8 | 24.5 | 100.0 |