Characteristics of the children.
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*Chi-square test farmer vs non-farmer. Mother or father atopic sensitization was defined as ever having asthma or rhinoconjunctivitis. Children with reported doctor-diagnosed asthma once or obstructive bronchitis more than once in their lifetime were defined as having asthma ever. Rhinoconjunctivitis was defined by reported doctor diagnosis of allergic rhinitis ever. Atopic sensitization was assessed for 314 of the 316 children.
创建时间：
2014-03-06
