Widening inequality in extreme macrosomia between Indigenous and non‐Indigenous populations of Québec, Canada

Abstract Objective : To evaluate trends in macrosomia by severity in Indigenous vs. non‐Indigenous populations of Québec, Canada. Methods: We used a retrospective cohort of 2,298,332 singleton live births in the province of Québec, 1981–2008. Indigenous births were identified by community of residen...

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Bibliographic Details
Published in:Australian and New Zealand Journal of Public Health
Main Authors: Nathalie Auger, Alison L. Park, Hamado Zoungrana, Mélanie Fon Sing, Ernest Lo, Zhong‐Cheng Luo
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2013
Subjects:
fetal growth
inequalities
macrosomia
North American Indians
Indigenous population
Inuits
Public aspects of medicine
RA1-1270
Canada
New Zealand
First Nations
inuit
inuits
Online Access:https://doi.org/10.1111/1753-6405.12011
https://doaj.org/article/a3e013365be54d5a89bbdaf76509e548
Description
Summary:Abstract Objective : To evaluate trends in macrosomia by severity in Indigenous vs. non‐Indigenous populations of Québec, Canada. Methods: We used a retrospective cohort of 2,298,332 singleton live births in the province of Québec, 1981–2008. Indigenous births were identified by community of residence (First Nations, Inuit, non‐Indigenous) and language spoken (First Nations, Inuit, French/English). High birth weight (HBW) and large‐for‐gestational‐age (LGA) births were categorised by severity (moderate, very, extreme). Time trends in HBW and LGA, by severity, were estimated using odds ratios (OR) and rate differences for Indigenous vs. non‐Indigenous births, adjusting for maternal characteristics. Results: Relative to non‐Indigenous, First Nations (but not Inuit) had higher rates of extreme HBW (1.3% vs. 0.1%) and extreme LGA birth (12.6% vs. 2.2%), and rates increased over time. First Nations had progressively elevated ORs with greater severity of macrosomia, and associations were strongest for extreme HBW >5,000 g (OR=12.4) and LGA >97th percentile (OR=7.2). Conclusion: Inequalities in extreme macrosomia between First Nations and non‐Indigenous Quebecers are pronounced and widened between 1981 and 2008. Implications: Studies are needed to determine why macrosomia rates are increasing in Québec's First Nations, and how they compare with Indigenous sub‐groups of demographically similar countries, including Australia and New Zealand.

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