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dc.contributor.authorPastorino, Silvia
dc.contributor.authorBishop, Tom
dc.contributor.authorCrozier, Sarah R
dc.contributor.authorGranström, Charlotta
dc.contributor.authorKordas, Katarzyna
dc.contributor.authorKüpers, Leanne K
dc.contributor.authorO'Brien, Eileen
dc.contributor.authorPolanska, Kinga
dc.contributor.authorSauder, Katherine A
dc.contributor.authorZafarmand, Mohammad Hadi
dc.contributor.authorWilson, Becca
dc.contributor.authorAgyemang, Charles
dc.contributor.authorBurton, Paul R
dc.contributor.authorCooper, Cyrus
dc.contributor.authorCorpeleijn, Eva
dc.contributor.authorDabelea, Dana
dc.contributor.authorHanke, Wojciech
dc.contributor.authorInskip, Hazel M
dc.contributor.authorMcAuliffe, Fionnuala
dc.contributor.authorOlsen, Sjurdur Frodi
dc.contributor.authorVrijkotte, Tanja G
dc.contributor.authorBrage, Soren
dc.contributor.authorKennedy, Aileen
dc.contributor.authorO'Gorman, Donal
dc.contributor.authorScherer, Paul
dc.contributor.authorWijndaele, Katrien
dc.contributor.authorWareham, Nick J
dc.contributor.authorDesoye, Gernot
dc.contributor.authorOng, Ken K
dc.description.abstractOBJECTIVE: Evidence on the impact of leisure time physical activity (LTPA) in pregnancy on birth size is inconsistent. We aimed to examine the association between LTPA during early and late pregnancy and newborn anthropometric outcomes. DESIGN: Individual level meta-analysis, which reduces heterogeneity across studies. SETTING: A consortium of eight population-based studies (seven European and one US) comprising 72,694 participants. METHODS: Generalised linear models with consistent inclusion of confounders (gestational age, sex, parity, maternal age, education, ethnicity, BMI, smoking and alcohol intake) were used to test associations between self-reported LTPA at either early (8-18 weeks gestation) or late pregnancy (30+ weeks) and the outcomes. Results were pooled using random effects meta-analyses. MAIN OUTCOME MEASURES: Birth weight, Large-for-gestational age (LGA), macrosomia, small-for-gestational age (SGA), %body fat and ponderal index at birth. RESULTS: Late, but not early, gestation maternal moderate-to-vigorous physical activity (MVPA), vigorous activity and LTPA energy expenditure were modestly inversely associated with BW, LGA, macrosomia and ponderal index, without heterogeneity (all: I-square=0%). For each extra hour/week of MVPA, RR for LGA and macrosomia were 0.97 (95% CI: 0.96, 0.98) and 0.96 (95%CI: 0.94, 0.98) respectively. Associations were only modestly reduced after additional adjustments for maternal BMI and gestational diabetes. No measure of LTPA was associated with risk for SGA. CONCLUSIONS: Physical activity in late, but not early, pregnancy is consistently associated with modestly lower risk of LGA and macrosomia, but not SGA. This article is protected by copyright. All rights reserved.
dc.description.sponsorshipIncludes MRC, Wellcome Trust and NIHR.
dc.rightsAttribution-NonCommercial 4.0 International
dc.subjectbirth weight
dc.subjectphysical activity
dc.titleAssociations between maternal physical activity in early and late pregnancy and offspring birth size: remote federated individual level meta-analysis from eight cohort studies.
prism.publicationNameBJOG: An International Journal of Obstetrics and Gynaecology
dc.contributor.orcidBishop, Thomas [0000-0002-3407-2526]
dc.contributor.orcidBrage, Soren [0000-0002-1265-7355]
dc.contributor.orcidScherer, Paul [0000-0002-2240-7501]
dc.contributor.orcidWijndaele, Katrien [0000-0003-2199-7981]
dc.contributor.orcidWareham, Nicholas [0000-0003-1422-2993]
dc.contributor.orcidOng, Kenneth [0000-0003-4689-7530]
rioxxterms.typeJournal Article/Review
pubs.funder-project-idMedical Research Council (MC_UU_12015/3)
pubs.funder-project-idMedical Research Council (MC_UU_12015/1)
pubs.funder-project-idMedical Research Council (MC_UU_12015/2)
pubs.funder-project-idEuropean Commission (602068)
pubs.funder-project-idDepartment of Health (via National Institute for Health Research (NIHR)) (NF-SI-0617-10149)
pubs.funder-project-idDepartment of Health (via National Institute for Health Research (NIHR)) (NF-SI-0512-10135)

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Attribution-NonCommercial 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial 4.0 International