To identify factors associated with peanut sensitization.

The study population included 512 infants aged 3 to 15 months with likely milk or egg allergy but no previous diagnosis of peanut allergy.

Enrollment criteria included history of immediate allergic reactions to cow's milk (and/or egg) and a positive skin-prick-test (SPT) result to milk (or egg if the clinical reaction was to egg) and/or moderate-to-severe atopic dermatitis and a positive SPT result to milk or egg. This longitudinal study was aimed at observing the development of peanut allergy; therefore, children with a known peanut allergy or known peanut-specific immunoglobulin E (IgE) level of ≥5 kU of antibody (kUA)/L before enrollment were excluded. Maternal ingestion of peanut was queried retrospectively. In categorical analyses, frequent maternal peanut ingestion was defined as ≥2 times per week. A peanut-IgE level of ≥5 kUA/L was used as the end point to signify a...

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