Cutoff point Sensitivity Specificity Positive predictive value Negative predictive value Diagnostic accuracy Total IgE50.05 IU/ml 44% 95% 96% 40% 59% Lactoglobulin specific IgE 0.345 IU/ml 78% 100% 100% 65% 84% Lactoalbumin specific IgE 0.335 IU/ml 84% 80% 91% 67% 83%

Table 3: Diagnostic validity of total IgE, lactoglobulin and lacto albumin specific IgE (IU/ml) in diagnosis of protein allergy cases.