Early markers of baked milk and egg tolerance in young children with IgE-mediated immediate reactions.

Summary: Background. Children with milk and egg allergies have outcomes in which three-quarters are tolerant to baked forms of the allergenic food. Identifying predictors of tolerance to baked foods for IgE-mediated immediate-type reactions may guide the early introduction of baked allergens to diet and tolerance development. This study explores factors associated with early tolerance to baked foods. Methods. We retrospectively analyzed patients with IgE-mediated immediate-type food allergy in infancy who either became tolerant to the baked form before two years or remained reactive after two years. Results. We examined 143 patients solely with IgE-mediated immediate-type egg and/ or milk allergies excluding those with atopic dermatitis. 76 (42 egg-allergics; 34 milk-allergics) achieved tolerance, and 67 (38 egg-allergics; 29 milk-allergics) were reactive beyond the age of two. Receiver operating characteristic analysis determined cut-off values for specific-Immunoglobulin E (sIgE) levels (kU/L) predicting mild phenotype at first admission: egg white-sIgE ≤ 7.39, milk-sIgE ≤ 5.99, and casein-sIgE ≤ 4.99, with AUC values of 0.703, 0.716, and 0.749, respectively. Conclusions. This study identifies key prognostic factors for tolerance to baked allergen for IgE-mediated immediate-type reactions, providing valuable insights to determine the patients who need more intensive care versus the ones who don't need baked allergen avoidance early in their life from their initial admission at infancy.