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Suhaimi, M.A., Zheng, Y., You, H., Su, Y., Williams, G.J. 
ORCID: 0000-0001-7689-1231, Gupta, M.P., Du, W. ORCID: 0000-0002-5115-7214 and Hua, J.,
2024.
Association between postterm birth and adverse growth outcomes in children aged 3-6 years: a national retrospective cohort study.
Paediatric and Perinatal Epidemiology.
ISSN 0269-5022
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Abstract
Background: Gestational age significantly influences children's growth and development. Yet, the effect of postterm birth (gestation beyond 42 weeks) on children's growth outcomes remains underexplored.
Objectives: This study aimed to assess the impact of postterm birth on adverse growth outcomes in children using a nationally representative sample from China.
Methods: A retrospective cohort study was conducted in China from 1 April 2018, to 31 December 2019. The final analysis included 141,002 children aged 3–6 years from 551 cities. Postterm birth was defined as children with postterm birth at a gestational age of 42 weeks or more. Obesity, overweight and thinness were assessed using body mass index-for-age (BMI-for-age) z-scores, based on the World Health Organization (WHO) Child Growth Standards. Generalised additive models were employed to investigate the non-linear relationship between maternal gestational age and BMI-for-age z scores. Poisson regression models and subgroup analyses with forest plots were performed to examine the associations between postterm birth and the risks of obesity, overweight and thinness in children.
Results: We included 141,002 mother–child pairs, of whom 7314 (5.2%) children were classified as postterm births. There exists a non-linear relationship between gestational age and BMI-for-age z scores. Children born postterm exhibited a 46% increased risk of obesity, a 27% increased risk of combined overweight/obesity and a 13% increased risk of thinness. Similar associations were observed in most cases when further sensitivity and subgroup analysis were conducted.
Conclusions: Postterm birth was associated with elevated risks of obesity, overweight and thinness in children aged 3–6 years, independent of sex. These findings underscore the importance of further research across diverse populations to understand the implications of postterm births on child health outcomes.
| Item Type: | Journal article | ||||||
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| Publication Title: | Paediatric and Perinatal Epidemiology | ||||||
| Creators: | Suhaimi, M.A., Zheng, Y., You, H., Su, Y., Williams, G.J., Gupta, M.P., Du, W. and Hua, J. | ||||||
| Publisher: | Wiley | ||||||
| Date: | 19 September 2024 | ||||||
| ISSN: | 0269-5022 | ||||||
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| Rights: | © 2024 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | ||||||
| Divisions: | Schools > School of Social Sciences | ||||||
| Record created by: | Jeremy Silvester | ||||||
| Date Added: | 20 Sep 2024 14:12 | ||||||
| Last Modified: | 20 Sep 2024 14:12 | ||||||
| URI: | https://irep.ntu.ac.uk/id/eprint/52270 |
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