Total IgE (kIU/L) Total IgE (kIU/L) Total IgE (kIU/L) Allergen-specific IgE (kUA/L) Allergen-specific IgE (kUA/L) Allergen-specific IgE (kUA/L) Total tryptase (µg/L) Total tryptase (µg/L) Total tryptase (µg/L)
Low (<100)
Medium (100-400) High (>400) Low (<5)
Medium (5-10)
High (>10)
Low (<8)
Medium (8-20)
High (>20)
Intra-assay variation (%CV) (Repeatability) 10 10 10 10 10 10 5 5 5
Interassay variation (%CV) (Reproducibility) 15 15 15 15 15 15 10 10 10
Bias (Accuracy) 20 15 15 30 25 25 20 20 20
Uncertainty of measurement (Precision) 30 20 20 30 30 30 25 25 25