title: Genetic basis of sex differences in the prevalence of asthma.
abstract: The possibility that sex differences in the prevalence of asthma are caused by a genetic sex influence was investigated in 298 asthmatic patients with three or more positive skin tests (sex ratio=1.35) and in 94 asthmatic patients with no positive skin tests (sex ratio=0.58). The distribution of asthma among the male and female relatives of the male and female patients was uniform in both groups, indicating there was no genetic sex influence.
mesh_terms: D000485:Allergens; D001249:Asthma / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D012882:Skin Tests
chemical_list: D000485:Allergens