TABLE 1.

Sensitivity and specificity values at various arbitrarily chosen cut off points for various testsa

IgG parameterCutoff point for IgGTest performance
Level in serumAvidity% Sensitivity(95% CI)% Specificity(95% CI)
Level in serum7.618(2-34)100
5.836(16-56)96(88-100)
4.555(34-76)92(81-100)
Avidity2.236(16-56)100
1.945(24-66)96(88-100)
1.850(29-71)92(81-100)
Level in serum plus avidity7.62.245(24-66)100
5.82.259(38-80)96(88-100)
4.52.268(49-87)92(81-100)
  • a IgG level in serum is the ELISA A450; CI, confidence interval.