Prevalence of asthma, rhinitis and eczema among children in 2 Canadian cities: the International Study of Asthma and Allergies in Childhood

Table 3: Prevalence of asthma and allergy symptoms by sex   Prevalence, %     Younger children   Older children     Disease or symptom Hamilton n = 3337 Saskatoon* n = 2414   Hamilton n = 3051 Saskatoon* n = 1897 Asthma ever           Boys 20.8 13.0   20.6 14.5 Girls 13.5† 9.5‡   17.9 9.9‡ Wheezing ever           Boys 38.2 28.7   43.2 36.4 Girls 27.9† 24.0§   45.6 36.3 Wheezing in past year           Boys 23.0 15.2   28.6 24.0 Girls 17.2† 12.9   32.5§ 24.1 Rhinitis ever           Boys 33.2 27.6   48.3 37.3 Girls 27.7‡ 23.5§   53.9‡ 41.4 Hay fever ever           Boys 12.1 8.7   26.2 10.9 Girls 9.3‡ 5.6‡   29.1 13.2 Eczema ever           Boys 21.3 22.1   10.5 13.6 Girls 20.0 22.2   18.3† 20.7† *The information on sex was missing for 4 children in both age groups in Saskatoon. †p < 0.001 for comparison between boys and girls. ‡p < 0.01 for comparison between boys and girls. §p < 0.05 for comparison between boys and girls.

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