Weight in the First Year of Life: Associations with Maternal Prepregnancy Body Mass Index and Gestational Weight Gain-Findings from a Longitudinal Pregnancy Cohort.
ObjectiveTo investigate the obesogenic influence of maternal prepregnancy body mass index (BMI) and gestational weight gain (GWG) on infant weight at birth and 12 months postpartum in an Australian general population sample.MethodsData on 1,305 pregnant women were collected on prepregnancy BMI and GWG through maternal interview, on infant weight at birth through hospital records, and on infant weight 12 months postbirth through direct measurement. Relationships between prepregnancy, gestational weight exposures, and infant weight outcomes were assessed with and without adjustment for potential confounding.ResultsWe observed a 14 to 24 g increase in infant birth weight for every 1 kg increase in maternal weight (infant birth weight: β(BMI) = 0.014,p< 0.000; β(GWG) = 0.012,p< 0.000; and 12 months: β(BMI) = 0.018,p< 0.000; β(GWG) = 0.024,p< 0.000). Effects remained after adjustment for potential confounders (infant birth weight: β(BMI) = 0.014,p< 0.000; β(GWG) = 0.012,p< 0.001; and 12 months: β(BMI)= 0.017,p≤ 0.033; β(GWG) = 0.023,p= 0.001). However, the effects observed were small, and there was no evidence that GWG mediated relationships between preconception BMI and infant weight.ConclusionIn a general population sample, there is a significant but not substantial observed relationship between maternal prepregnancy BMI and GWG and infant weight outcomes, suggesting a minor role for these factors at a population level.
Faculty of Health, School of Psychology, Centre for Social and Early Emotional Development, Deakin University, Geelong, Victoria, Australia.
Skye
S
McPhie
Faculty of Health, School of Psychology, Centre for Social and Early Emotional Development, Deakin University, Geelong, Victoria, Australia.
Helen
H
Skouteris
National Drug and Alcohol Research Centre, University of New South Wales, Sydney, New South Wales, Australia.
Richard P
RP
Mattick
National Drug and Alcohol Research Centre, University of New South Wales, Sydney, New South Wales, Australia.
Judy
J
Wilson
National Drug and Alcohol Research Centre, University of New South Wales, Sydney, New South Wales, Australia.
Ingrid
I
Honan
National Drug Research Institute, Curtin University, Perth, Western Australia, Australia.
Steve
S
Allsop
National Drug and Alcohol Research Centre, University of New South Wales, Sydney, New South Wales, Australia.
Lucy
L
Burns
Discipline of Paediatrics and Child Health, The University of Sydney, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.
Elizabeth
E
Elliott
Faculty of Health, School of Psychology, Centre for Social and Early Emotional Development, Deakin University, Geelong, Victoria, Australia.
Samantha
S
Teague
Faculty of Health, School of Psychology, Centre for Social and Early Emotional Development, Deakin University, Geelong, Victoria, Australia.|Murdoch Children's Research Institute, Population Studies of Adolescents, Royal Children's Hospital, Melbourne, Victoria, Australia.|Department of Paediatrics and Psychological Sciences, University of Melbourne, Royal Children's Hospital, Melbourne, Victoria, Australia.
Craig A
CA
Olsson
Faculty of Health, School of Psychology, Centre for Social and Early Emotional Development, Deakin University, Geelong, Victoria, Australia.|National Drug and Alcohol Research Centre, University of New South Wales, Sydney, New South Wales, Australia.|Murdoch Children's Research Institute, Population Studies of Adolescents, Royal Children's Hospital, Melbourne, Victoria, Australia.|Department of Paediatrics and Psychological Sciences, University of Melbourne, Royal Children's Hospital, Melbourne, Victoria, Australia.
Delyse
D
Hutchinson
D000328:Adult; D001315:Australia / Q000453:epidemiology; D001724:Birth Weight; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007223:Infant; D000068104:Infant Health / Q000706:statistics & numerical data*; D008137:Longitudinal Studies; D008297:Male; D009765:Obesity / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000453:epidemiology; D011256:Pregnancy Outcome / Q000453:epidemiology; D013223:Statistics as Topic; D015430:Weight Gain