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Table 2 Cut-off values, sensitivity, specificity, and AUC* for egg-specific IgE, IgG 4 , and IgE/IgG 4

From: Predictive value of IgE/IgG4 antibody ratio in children with egg allergy

  IgE IgG4 IgE/IgG4
Cut-off value 8.9 (kUA/L) 1.93 (mgA/L) 13.63
Sensitivity (%) 68.3 53.3 83.3
Specificity (%) 68.9 88.3 80.0
Positive predictive value (%) 74.5 77.4 84.7
Negative predictive value (%) 62 71.4 78.3
AUC* (%) 0.697 0.724 0.847
  1. *Area under the curve.