Figure 2.
Eosinophils and IgE stratified by age. Scatter plots show all patients included in the analysis with every reported Eosinophil (A) or IgE (B) value. Patient age was calculated as the time interval between their laboratory date and June 15th of their birth year, as birth month and date were not provided for patient confidentiality and anonymity. Dashed line represents Eosinophil and IgE upper limits stratified by age based on reference populations (22, 23). Eosinophil upper limits correspond to 900 cells/μL in those <1 years, and 500 cells/μL for those 1 years of age and older (with values for individuals aged greater than 21 extrapolated to be 500 cells/μL). IgE level upper limits are: 6 to 12 months, 34 IU/ml; 1 to 2 years, 97 IU/ml; 3 years, 199 IU/ml; 4 to 6 years, 307 IU/ml; 7 to 8 years, 403 IU/ml; 9 to 12 years, 696 IU/ml; 13 to 15 years, 629 IU/ml; 16 to 17 years; 537 IU/ml; 18 years and older, 214 IU/ml (23). For individuals less than 6 months of age, the IgE level upper limit was extrapolated as 34 IU/ml.