Infant Allergy Testing and Food Allergy Diagnoses Before and After Guidelines for Early Peanut Introduction.

Background: A landmark 2015 trial on early exposure to peanuts led to expert recommendations for screening and early peanut introduction in high-risk (severe eczema and/or egg allergy) infants, but the impact of this paradigm shift on allergy testing and diagnosis is unknown.

Objective: We assessed the effects of the Learning Early About Peanut Allergy (LEAP) trial and guideline publications on allergy testing and food allergy diagnoses in infants.

Methods: In this retrospective cohort study, deidentified administrative health claims from a commercial and Medicare advantage claims database were used.