Treatment-requiring accidental ingestion and risk factors among nursery children with food allergy.

Accidental ingestion of food allergens is a critical and frequent incident in nursery schools, with 7.6% of children in Japan experiencing accidental ingestion of food allergens within 1 year. Younger age, male sex, and wheat allergy are recognized risk factors.2 However, the frequency of accidental ingestion of each allergen and risk factors for treatment-requiring moderate-to-severe accidental ingestion remain unknown in nursery schools. This study examined the prevalence of accidental ingestion of four common allergens and risk factors for treatment-requiring accidental ingestion in nursery schools in Japan.