Pre-pregnancy body mass index and breastfeeding initiation, early cessation and longevity: evidence from the first wave of the UK Millennium Cohort Study

Campbell, Tammy; Shackleton, Nichola

doi:10.1136/jech-2017-209074

Cited by 15 publications

(14 citation statements)

References 33 publications

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“…In addition, for those studies in which there was a report for number and/or percent of initiation/intention of BF by levels of BMI, we calculated the crude OR/RR [ 2 , 11 , 22 , 27 , 28 , 29 , 30 , 31 , 32 ]. In order to calculate OR for the association between levels of BMI and BF, and if the authors used the non-initiation/intention group as reference, we calculated OR by the proportion of non-initiation/intention of BF to initiation/intention of BF (by using the reciprocal characteristic of OR) [ 1 , 7 , 27 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. Also, in a study by Hilson et al.…”

Section: Methodsmentioning

confidence: 99%

The effect of pre-pregnancy body mass index on breastfeeding initiation, intention and duration: A systematic review and dose-response meta-analysis

Hashemi-Nazari

Hasani

Izadi

et al. 2020

Heliyon

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Section: Methodsmentioning

confidence: 99%

The effect of pre-pregnancy body mass index on breastfeeding initiation, intention and duration: A systematic review and dose-response meta-analysis

Hashemi-Nazari

Hasani

Izadi

et al. 2020

Heliyon

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“…Ascertaining these exposures prior to pregnancy is also a strength as compared with many studies that obtained pre-pregnancy weight from selfreports during pregnancy. 33 The study has some limitations. First, we cannot identify whether the associations of pre-pregnancy IFG and BMI with LGA and PTB were modified by pregnancy complications (pre-eclampsia and gestational diabetes) because most of the participants (99.1%) did not test Epidemiology/Health services research for gestational diabetes and pre-eclampsia.…”

Section: Strengths and Limitationsmentioning

confidence: 98%

Associations of pre-pregnancy impaired fasting glucose and body mass index among pregnant women without pre-existing diabetes with offspring being large for gestational age and preterm birth: a cohort study in China

Jing

Chen

et al. 2021

BMJ Open Diab Res Care

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IntroductionAssociations of pre-pregnancy impaired fasting glucose (IFG) and body mass index (BMI) with large for gestational age (LGA) and preterm birth (PTB) have been poorly understood. We aimed to investigate the associations of maternal BMI, separately and together with pre-pregnancy IFG, with LGA and PTB in Chinese population. We also aimed to quantify these associations by maternal age.Research design and methodsThis was a retrospective cohort study of women from the National Free Preconception Health Examination Project with singleton birth from 121 counties/districts in 21 cities of Guangdong Province, China, from January 1, 2013 to December 31, 2017. Women were included if they did not have pre-existing chronic diseases (diabetes, hypertension, etc). Participants were divided into eight groups according to their BMI (underweight (BMI <18.5 kg/m2), normal weight (18.5–23.9 kg/m2), overweight (24.0–27.9 kg/m2), and obesity (≥28.0 kg/m2)) and pre-pregnancy fasting glucose status (normoglycemia (fasting glucose concentration <6.1 mmol/L) and IFG (6.1–7.0 mmol/L)). Adjusted incidence risk ratios (aIRRs) and 95% CIs of LGA, severe LGA, PTB and early PTB were estimated.ResultsWe included 634 030 women. The incidences of LGA, severe LGA, PTB and early PTB for the study population were 7.1%, 2.5%, 5.1% and 1.1%, respectively. Compared with normal weight mothers with normoglycemia, overweight and obese mothers irrespective of IFG had a higher risk of LGA (eg, obesity with IFG aIRR 1.85 (1.60–2.14)) and severe LGA (eg, obesity with IFG 2.19 (1.73–2.79)). The associations of BMI and pre-pregnancy fasting glucose status with LGA were similar found among women of all age groups. Underweight with normoglycemia had 6.0% higher risk of PTB (1.06 (1.03–1.09)) and 8.0% higher risk of early PTB (1.08 (1.02–1.17)), underweight with IFG had 14.0% higher risk of PTB (1.14 (1.02–1.27)), and obese mothers with IFG had 45.0% higher risk of PTB (1.45 (1.18–1.78)). The associations of BMI and pre-pregnancy fasting glucose status with PTB differed by maternal age.ConclusionOverweight and obesity regardless of IFG were associated with an increased risk of LGA, and these associations were similarly observed among mothers of all age groups. Underweight regardless of IFG, and obesity with IFG were associated with an increased risk of PTB, but the associations differed by maternal age. Findings from this study may have implications for risk assessment and counselling before pregnancy.

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“…Open access rural Australian populations, these rates have been consistently lower than that reported in urban populations with exclusive breast feeding decreasing in all almost immediately following hospital discharge resulting in less than 20% of babies being exclusively breast fed by 6 months. 4 High maternal body mass index (BMI) is negatively associated with breast feeding initiation, [5][6][7][8] but it remains unclear if the association is confounded by other risk factors such as mother's age, low socioeconomic status (SES), comorbidities or antenatal, intrapartum or postpartum conditions or neonate's overall health. 9 10 Changes in breast feeding initiation rates across three national surveys in Australia concluded that although these rates increased from 86% in 1995 to 88% in 2004-2005, they were consistently lower in women belonging to lower socioeconomic groups.…”

Section: Strengths and Limitations Of This Studymentioning

confidence: 99%

Relationship between obesity and lower rates of breast feeding initiation in regional Victoria, Australia: an 8-year retrospective panel study

et al. 2021

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ObjectivesUsing routinely collected hospital data, this study explored secular trends over time in breast feeding initiation in a large Australian sample. The association between obesity and not breast feeding was investigated utilising a generalised estimating equations logistic regression that adjusted for sociodemographics, antenatal, intrapartum and postpartum conditions, mode of delivery and infant’s-related covariates.DesignPopulation-based retrospective panel.SettingA regional hospital that serves 26% of Victoria’s 6.5 million population in Australia.ParticipantsAll women experiencing live births between 2010 and 2017 were included. Women with missing body mass index (BMI) were excluded.ResultsA total of 7491 women contributed to 10 234 live births. At baseline, 57.2% of the women were overweight or obese, with obesity increasing over 8 years by 12.8%, p=0.001. Although, breast feeding increased over time, observed in all socioeconomic status (SES) and BMI categories, the lowest proportions were consistently found among the obese and morbidly obese (78.9% vs 87.1% in non-obese mothers, p<0.001). In the multivariable analysis, risk of not breast feeding was associated with higher BMI, teenage motherhood, smoking, belonging to the lowest SES class, gravidity >4 and undergoing an assisted vaginal or caesarean delivery. Compared with women with a normal weight, the obese and morbidly obese were 66% (OR 1.66, 95% CI 1.40 to 1.96, p<0.001) to 2.6 times (OR 2.61, 95% CI 2.07 to 3.29, p<0.001) less likely to breast feed, respectively. The detected dose–response effect between higher BMI and lower breast feeding was not explained by any of the study covariates.ConclusionThis study provides evidence of increasing breast feeding proportions in regional Victoria over the past decade. However, these proportions were lowest among the obese and morbidly obese and those coming from the most disadvantaged backgrounds suggesting the need for targeted interventions to support breast feeding among these groups. The psychosocial and physiological associations between obesity and breast feeding should further be investigated.

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Pre-pregnancy body mass index and breastfeeding initiation, early cessation and longevity: evidence from the first wave of the UK Millennium Cohort Study

Cited by 15 publications

References 33 publications

The effect of pre-pregnancy body mass index on breastfeeding initiation, intention and duration: A systematic review and dose-response meta-analysis

The effect of pre-pregnancy body mass index on breastfeeding initiation, intention and duration: A systematic review and dose-response meta-analysis

Associations of pre-pregnancy impaired fasting glucose and body mass index among pregnant women without pre-existing diabetes with offspring being large for gestational age and preterm birth: a cohort study in China

Relationship between obesity and lower rates of breast feeding initiation in regional Victoria, Australia: an 8-year retrospective panel study

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