Risk of allergy:IgE Levels 100 Percent 80 of subjects 60 40 20 0 <6060-200200-450>450 of population with given IgE concentration of subjects with that IgE concentration who are atopicRisk of allergy: IgE Levels 100 80 60 40 20 0 <60 60-200 200-450 >450 Percent of subjects % of population with given IgE concentration % of subjects with that IgE concentration who are atopic