BMJ  2004;328:386-387 (14 February), doi:10.1136/bmj.328.7436.386

Paper

Prevalence of asthma and allergy in schoolchildren in Belmont, Australia: three cross sectional surveys over 20 years

¹ University of Sydney, Woolcock Institute of Medical Research, Box M77 Missenden Road Post Office, Camperdown, NSW 2050, Australia, ² Department of Paediatrics and Child Health, University of Sydney

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Introduction

We have previously shown that the prevalence of asthma in Australian primary schoolchildren increased substantially between 1982 and 1992.¹ Similar increases have been reported in studies of children of different ages and from various geographical regions, spanning periods up to the mid-1990s.² It is not known whether this trend has continued during the late 1990s and early 2000s. We therefore conducted a third cross sectional study in the same population that was surveyed previously.¹ We report here on prevalence trends over the latter 10 year period.

Participants, methods, and results

We conducted all studies during June and July in primary schools in and around Belmont, a coastal suburb some 150 km north of Sydney, Australia. We invited all children in years 3, 4, and 5 (ages 8-11 years) at selected schools to participate and studied only children who had parental consent. Parents completed a questionnaire about symptoms, diagnosis, and treatment of asthma and other . . . [Full text of this article]

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