Importance of chamber size for the outcome of atopy patch testing in children with atopic dermatitis and food allergy.

Because the small backs of young children offer little space for atopy patch testing, it would be helpful to use smaller chambers. We therefore compared 6-mm chambers with the 12-mm chambers used in previous studies. We performed 55 double-blind, placebo-controlled food challenges in 30 children (17 boys, 13 girls) aged 3 to 58 months (median, 13 months).