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Routine Vaccination Against Pertussis and the Risk of Childhood Asthma: A Population-Based Cohort Study

By Ben Daniel Spycher, Michael Silverman, Matthias Egger, Marcel Zwahlen and Claudia Elisabeth Kuehni

Abstract

This paper was published as Pediatrics, 2009, 123 (3), pp. 944-950. It is available from http://pediatrics.aappublications.org/cgi/content/abstract/123/3/944. Doi: 10.1542/peds.2008-0115Metadata only entryBACKGROUND. In industrialized countries vaccination coverage remains suboptimal, partly because of perception of an increased risk of asthma. Epidemiologic studies of the association between childhood vaccinations and asthma have provided conflicting results, possibly for methodologic reasons such as unreliable vaccination data, biased reporting, and reverse causation. A recent review stressed the need for additional, adequately controlled large-scale studies. \ud \ud OBJECTIVE. Our goal was to determine if routine childhood vaccination against pertussis was associated with subsequent development of childhood wheezing disorders and asthma in a large population-based cohort study. \ud \ud METHODS. In 6811 children from the general population born between 1993 and 1997 in Leicestershire, United Kingdom, respiratory symptom data from repeated questionnaire surveys up to 2003 were linked to independently collected vaccination data from the National Health Service database. We compared incident wheeze and asthma between children of different vaccination status (complete, partial, and no vaccination against pertussis) by computing hazard ratios. Analyses were based on 6048 children, 23 201 person-years of follow-up, and 2426 cases of new-onset wheeze. \ud \ud RESULTS. There was no evidence for an increased risk of wheeze or asthma in children vaccinated against pertussis compared with nonvaccinated children. Adjusted hazard ratios comparing fully and partially vaccinated with nonvaccinated children were close to one for both incident wheeze and asthma. \ud \ud CONCLUSION. This study provides no evidence of an association between vaccination against pertussis in infancy and an increased risk of later wheeze or asthma and does not support claims that vaccination against pertussis might significantly increase the risk of childhood asthma

Publisher: American Academy of Pediatrics
Year: 2009
DOI identifier: 10.1542/peds.2008-0115
OAI identifier: oai:lra.le.ac.uk:2381/4762
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