Demographic data of the cohort population from newborn to 6 years of age.

*A higher total IgE level in cord blood (newborn) was cut-off at ≥0.5 kU/L as previously described; higher total IgE levels at 1.5, 3 and 6 years of age were defined as above the 75th percentile of the total IgE collected from the study population.#Atopy was defined as phenotypic asthma, rhinitis and/or atopic dermatitis along with detectable serum specific IgE to one or more common allergens.†Prematurity was defined as a gestational age