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Preterm birth and inhaled corticosteroid use in 6- to 19-year-olds:  A Swedish national cohort study
Stockholm University, Faculty of Social Sciences, Centre for Health Equity Studies (CHESS).
2011 (English)In: Pediatrics, ISSN 0031-4005, E-ISSN 1098-4275, Vol. 127, no 6, 1052-1069 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: Preterm birth is associated with respiratory morbidity later in life, including asthma. Previous studies have mainly focused on asthma in early childhood in children born extremely preterm. In this study, we examined the risk of asthma in a national cohort of schoolchildren grouped according to degree of immaturity expressed as completed gestational weeks at birth.

METHODS: This was a register study in a Swedish national cohort of 1 100 826 children 6 to 19 years old. Retrieval of at least 1 prescription of inhaled corticosteroids (ICS) during 2006 was used as the main indicator for asthma. Logistic regression was used to test hypotheses, with adjustment for multiple socioeconomic and perinatal indicators.

RESULTS: Degree of immaturity, expressed as completed gestational weeks at birth, had an inverse dose-response relationship with ICS use. Compared with children born between 39 and 41 weeks' gestation, the odds ratio for ICS use increased with the degree of prematurity, from 1.10 (95% confidence interval: 1.08–1.13) for children born in weeks 37 to 38, to 2.28 (95% confidence interval: 1.96–2.64) for children born in weeks 23 to 28, after adjustment for confounders. The increase in ICS use with decreasing gestational age at delivery was similar in boys and girls, and declined with older age.

CONCLUSION: Preterm birth increased the risk of ICS use in these 6- to 19-year-olds by degree of immaturity, from extremely preterm to early term birth.

Place, publisher, year, edition, pages
2011. Vol. 127, no 6, 1052-1069 p.
Keyword [en]
premature birth, asthma, inhaled corticosteroids, adolescents
National Category
Other Medical Sciences not elsewhere specified
Identifiers
URN: urn:nbn:se:su:diva-58027DOI: 10.1542/peds.2010-3083ISI: 000291146100045OAI: oai:DiVA.org:su-58027DiVA: diva2:419598
Available from: 2011-05-27 Created: 2011-05-27 Last updated: 2017-12-11Bibliographically approved

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