Associations between maternal physical activity in early and late pregnancy and offspring birth size: remote federated individual level meta-analysis from eight cohort studies.

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Autor/Urheber	Pastorino, S; Bishop, T; Crozier, SR; Granström, C; Kordas, K; Küpers, LK; O'Brien, EC; Polanska, K; Sauder, KA; Zafarmand, MH; Wilson, RC; Agyemang, C; Burton, PR; Cooper, C; Corpeleijn, E; Dabelea, D; Hanke, W; Inskip, HM; McAuliffe, FM; Olsen, SF; Vrij
Institution	Wiley-Blackwell; BJOG : an international journal of obstetrics and gynaecology
Titel	Associations between maternal physical activity in early and late pregnancy and offspring birth size: remote federated individual level meta-analysis from eight cohort studies.
Quelle	In: doi:10.17863/CAM.33050(2019) PDF als Volltext kostenfreie Datei
Sprache	englisch
Dokumenttyp	online; Zeitschriftenaufsatz
DOI	10.17863/CAM.33050
Schlagwörter	Adipose Tissue; Humans; Pregnancy Complications; Diabetes; Gestational; Fetal Macrosomia; Obesity; Birth Weight; Exercise; Cohort Studies; Energy Metabolism; Pregnancy; Pregnancy Trimester; First; Second; Third; Adult; Infant; Newborn; Small for Gestational Age; Female; Overweight; Young Adult; Protective Factors
Abstract	OBJECTIVE: 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. ; Includes MRC, Wellcome Trust and NIHR.
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