Abstract

Peanut allergy is the main food allergy in childhood and poses significant health concerns. This study aimed to critically evaluate the effectiveness and safety of Oral Immune Therapy (OIT) using crushed peanuts versus peanut puffs. Children with an allergist diagnosed peanut allergy based on a history of an IgE-mediated reaction and a positive skin prick test for peanuts were recruited at the Montreal Children's Hospital and the Children's Clinic located in Montreal. Based on age and personal preference, initial doses of peanut were given in either puff (Bamba) or crushed peanut form. Patients continued the same dose for 2-5 weeks at home, filled out a symptom diary, and returned to the clinic for up-dosing until maintenance was reached (2 teaspoons of peanut butter). A continuation ratio regression model was used to evaluate the effect of the allergen type on the severity of anaphylactic and allergic reactions during OIT while adjusting for potential confounders. Between October 2020 and June 2023, 191 children (59.6% male; median age 1.95 years) were recruited. Most patients (75.1%) had eczema, and 12.7% had asthma. Oral desensitization was performed using one of two strategies according to the allergist: Crushed peanut (n=60 (31.4%)( and peanut puff (n=131 (68.6%)). Of the participants, the consumption of puff lowered reaction severity by a factor of 3.39 (95% CI, 1.4 to 8.22), in comparison to crushed peanuts. Older age markedly elevates the adjusted odds of reacting to a particular severity level as compared to a lower level by 1.19 (95% CI, 1.04 to 1.37). Modified peanut desensitization using peanut puffs has shown potential in reducing the severity of allergic reactions in younger children. Older children may experience a higher risk of severe reactions, indicating the need for age-specific approaches to desensitization protocols.

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