Table 6 Comparison of three commercial ELISAs for detection of PRRSV antibodies in pig serum
ELISA II | ELISA III | ELISA IV | Used groups | |
|---|---|---|---|---|
Sensitivity (%) | 96.0 | 100.0 | 91.5 | 1-2 (n = 266) |
Specificity (%) | 99.0 | 95.1 | 96.4 | 3 (n = 309) |
Positive predictive value (%) | 86.0 | 73.7 | 66.9 | 1-4 (n = 828) |
Negative predictive value (%) | 98.7 | 100.0 | 97.4 | 1-4 (n = 828) |
Accuracy (%) | 95.3 | 91.4 | 88.2 | 1-4 (n = 828) |
Kappa coefficient (κ) | 0.88 | 0.83 | 0.71 | 1-4 (n = 828) |