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International Journal of Epidemiology 2001;30:179-180
© International Epidemiological Association 2001

Respiratory

Commentary: Geographical heterogeneity of asthma

Guy B Marks

Institute of Respiratory Medicine, University of Sydney, Australia. E-mail: g.marks@unsw.edu.au

The marked regional variation in the prevalence of asthma and other atopic diseases,1,2 together with increases in the prevalence of asthma over time (e.g.3), strongly imply that environmental factors are important in the aetiology of allergic disease.

In this issue of the International Journal of Epidemiology Stewart et al.4 have investigated the observed geographical heterogeneity to gain insights into the aetiology of these diseases. They used data on the prevalence of reported wheeze, symptoms of rhinoconjunctivitis and symptoms of eczema among school-age . . . [Full Text of this Article]

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