Table 1

 The proportion of school age children with wheeze or asthma who have an allergy in different countries

ReferencePopulationProportion with allergy (%)
Downs et al2Australian children who had wheezed in the past 12 months66
Mortz et al33Danish children with asthma74
Tariq et al30UK children who developed wheeze after infancy50
Crimi et al35Italian children with lifetime asthma66
Norrman et al37Swedish boys with asthma63
Swedish girls with asthma83
Martinez et al36US children with persistent wheeze51
US children with late-onset wheeze56