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dc.contributor.authorRegan, A.
dc.contributor.authorPereira, Gavin
dc.date.accessioned2018-12-13T09:11:28Z
dc.date.available2018-12-13T09:11:28Z
dc.date.created2018-12-12T02:46:30Z
dc.date.issued2018
dc.identifier.citationRegan, A. and Pereira, G. 2018. A population-based matched sibling analysis estimating the association between first interpregnancy interval and birth outcomes. American Journal of Epidemiology. 188 (1): pp. 9–16.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/71844
dc.identifier.doihttps://doi.org/10.1093/aje/kwy188
dc.description.abstract

The association between a single interpregnancy interval (IPI) and birth outcomes has not yet been explored using matched methods. We modeled the odds of preterm birth, being small for gestational age, and having low birth weight in a second, live-born infant in a cohort of 192,041 sibling pairs born in Western Australia between 1980 and 2010. The association between IPI and birth outcomes was estimated from the interaction between birth order and IPI (with 18–23 months as the reference category), using conditional logistic regression. Matched analysis showed the odds of preterm birth were higher for siblings born following an IPI of <6 months (adjusted interaction odds ratio = 1.22, 95% confidence interval: 1.06, 1.38) compared with those born after an IPI of 18–23 months. There were no significant differences for IPIs of <6 months for other outcomes (small for gestational age or low birth weight). This is the first study to use matched analyses to investigate the association between a single IPI on birth outcomes. IPIs of <6 months were associated with increased odds of preterm birth in second-born infants, although the association is likely smaller than previously estimated by unmatched studies.

dc.publisherOxford University Press
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/nhmrc/1099655
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/nhmrc/1047263
dc.titleA population-based matched sibling analysis estimating the association between first interpregnancy interval and birth outcomes
dc.typeJournal Article
dcterms.source.volume1
dcterms.source.startPage1000
dcterms.source.endPage1000
dcterms.source.issn0002-9262
dcterms.source.titleAmerican Journal of Epidemiology
curtin.departmentSchool of Public Health
curtin.accessStatusOpen access via publisher


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