Characteristic features of the entire population, the control group and the AR group.

All the values are expressed in absolute numbers and percentage in brackets. *Chi-square test when conditions were respected or Fisher's exact tests otherwise. Boldface values indicate statistical significance. Food allergy was defined by clinical symptoms of allergy after consumption of a food allergen and a positivity of specific IgE for the same allergen. Severity of asthma was determined according to the National Asthma Education and Prevention Program [20]. Polysensitization is defined as two or more specific allergen sensitizations.Any aeroallergen is defined as at least one aeroallergen sensitization.