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Influence of maternal excess weight before pregnancy on breast-feeding and weaning: pooled analyses of four population-based cohorts born between 1982 and 2015

Published online by Cambridge University Press:  11 August 2021

Thaynã R. Flores*
Affiliation:
Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
Gregore I. Mielke
Affiliation:
School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia
Alicia Matijasevich
Affiliation:
Department of Preventive Medicine, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, Brazil
Iná da Silva dos Santos
Affiliation:
Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
Mariângela Freitas Silveira
Affiliation:
Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
Marlos Rodrigues Domingues
Affiliation:
Postgraduate Program in Physical Education, Federal University of Pelotas, Pelotas, Brazil
Diego G. Bassani
Affiliation:
Department of Pediatrics, Faculty of Medicine and Dalla Lana School of Public Health, Toronto, Canada
Helen Gonçalves
Affiliation:
Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
Bernardo Lessa Horta
Affiliation:
Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
Andréa Dâmaso Bertoldi
Affiliation:
Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
*
*Corresponding author: Thaynã R. Flores, email floresrthayna@gmail.com

Abstract

To investigate the associations of maternal excess weight before pregnancy with (1) weaning at 3 months of age, (2) duration of exclusive breast-feeding at 6 months of age, (3) duration of any breast-feeding at 12 months of age and (4) to compare the magnitude of these associations over four decades. Data were from participants in the Pelotas (Brazil) Birth Cohorts born in 1982 (n 5334), 1993 (n 1442), 2004 (n 4092) and 2015 (n 4102). Maternal pre-pregnancy weight was collected after the delivery and breast-feeding status was assessed when children were 3 and 12 months old. Only in the most recent cohort (2015), women with excess weight (BMI ≥ 25 kg/m2) before pregnancy had higher risk of discontinuing exclusive breast-feeding within the first 6 months postpartum than women with normal weight (hazard ratio = 1·22 (95 % CI 1·15, 1·30)). Duration of any type of breast-feeding until 12 months of age was not affected by pre-pregnancy weight. Excess weight before pregnancy is associated with exclusive breast-feeding only in the most recent birth cohort coinciding with increases in excess weight and breast-feeding over time.

Type
Research Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of The Nutrition Society

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