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Underweight in the First 2 Years of Life and Growth in Later Childhood
IMPORTANCE: Few studies have examined the association between underweight in the first 2 years and growth in later childhood in high-income countries. OBJECTIVE: To evaluate the associations of underweight in the first 2 years of life with body mass index (calculated as weight in kilograms divided b...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Medical Association
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9338407/ https://www.ncbi.nlm.nih.gov/pubmed/35904782 http://dx.doi.org/10.1001/jamanetworkopen.2022.24417 |
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author | South, Courtney A. Keown-Stoneman, Charles D. G. Birken, Catherine S. Malik, Vasanti S. Zlotkin, Stanley H. Maguire, Jonathon L. |
author_facet | South, Courtney A. Keown-Stoneman, Charles D. G. Birken, Catherine S. Malik, Vasanti S. Zlotkin, Stanley H. Maguire, Jonathon L. |
author_sort | South, Courtney A. |
collection | PubMed |
description | IMPORTANCE: Few studies have examined the association between underweight in the first 2 years and growth in later childhood in high-income countries. OBJECTIVE: To evaluate the associations of underweight in the first 2 years of life with body mass index (calculated as weight in kilograms divided by height in meters squared) z score (zBMI), weight-for-age z score (WAZ), and height-for-age z score (HAZ) from ages 2 to 10 years. DESIGN, SETTING, AND PARTICIPANTS: This prospective cohort study was conducted between February 2008 to September 2020 in The Applied Research Group for Kids! practice-based research network in Toronto, Canada. Participants included healthy children aged 0 to 10 years. Data were analyzed from October 2020 to December 2021. EXPOSURES: Underweight (ie, zBMI less than −2, per the World Health Organization) in the first 2 years of life. MAIN OUTCOMES AND MEASURES: The primary outcome was zBMI from ages 2 to 10 years. Linear mixed-effects models were used to account for multiple growth measures over time. RESULTS: A total of 5803 children were included in the primary analysis. At baseline, the mean (SD) age was 4.07 (5.62) months, 2982 (52.2%) were boys, and 550 children (9.5%) were underweight. Underweight in the first 2 years was associated with lower zBMI (difference, −0.39 [95% CI, −0.48 to −0.31]) at 10 years and lower HAZ (difference, −0.24 [95% CI, −0.34 to −0.14]) at age 2 years. Stratified by sex, at age 10 years, girls and boys with underweight in the first 2 years both had lower zBMI (girls: difference, −0.47 [95% CI, −0.59 to −0.34]; boys: difference, −0.32 [95% CI, −0.44 to −0.20]). At age 10 years, children with underweight and a lower zBMI growth rate in the first 2 years had lower zBMI (difference, −0.64 [95% CI, −0.77 to −0.53) and HAZ (difference, −0.12 [−0.24 to −0.01]), while children with underweight and a higher zBMI growth rate in the first 2 years had similar zBMI (difference, −0.11 [95% CI, −0.22 to 0.001]) and higher HAZ (difference, 0.16 [95% CI, 0.05 to 0.27]) compared with children who did not have underweight in the first 2 years. CONCLUSIONS AND RELEVANCE: In this prospective cohort study, children with underweight in the first 2 years of life had lower zBMI and HAZ in later childhood. These associations were attenuated among children with a higher growth rate in the first 2 years. |
format | Online Article Text |
id | pubmed-9338407 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Medical Association |
record_format | MEDLINE/PubMed |
spelling | pubmed-93384072022-08-16 Underweight in the First 2 Years of Life and Growth in Later Childhood South, Courtney A. Keown-Stoneman, Charles D. G. Birken, Catherine S. Malik, Vasanti S. Zlotkin, Stanley H. Maguire, Jonathon L. JAMA Netw Open Original Investigation IMPORTANCE: Few studies have examined the association between underweight in the first 2 years and growth in later childhood in high-income countries. OBJECTIVE: To evaluate the associations of underweight in the first 2 years of life with body mass index (calculated as weight in kilograms divided by height in meters squared) z score (zBMI), weight-for-age z score (WAZ), and height-for-age z score (HAZ) from ages 2 to 10 years. DESIGN, SETTING, AND PARTICIPANTS: This prospective cohort study was conducted between February 2008 to September 2020 in The Applied Research Group for Kids! practice-based research network in Toronto, Canada. Participants included healthy children aged 0 to 10 years. Data were analyzed from October 2020 to December 2021. EXPOSURES: Underweight (ie, zBMI less than −2, per the World Health Organization) in the first 2 years of life. MAIN OUTCOMES AND MEASURES: The primary outcome was zBMI from ages 2 to 10 years. Linear mixed-effects models were used to account for multiple growth measures over time. RESULTS: A total of 5803 children were included in the primary analysis. At baseline, the mean (SD) age was 4.07 (5.62) months, 2982 (52.2%) were boys, and 550 children (9.5%) were underweight. Underweight in the first 2 years was associated with lower zBMI (difference, −0.39 [95% CI, −0.48 to −0.31]) at 10 years and lower HAZ (difference, −0.24 [95% CI, −0.34 to −0.14]) at age 2 years. Stratified by sex, at age 10 years, girls and boys with underweight in the first 2 years both had lower zBMI (girls: difference, −0.47 [95% CI, −0.59 to −0.34]; boys: difference, −0.32 [95% CI, −0.44 to −0.20]). At age 10 years, children with underweight and a lower zBMI growth rate in the first 2 years had lower zBMI (difference, −0.64 [95% CI, −0.77 to −0.53) and HAZ (difference, −0.12 [−0.24 to −0.01]), while children with underweight and a higher zBMI growth rate in the first 2 years had similar zBMI (difference, −0.11 [95% CI, −0.22 to 0.001]) and higher HAZ (difference, 0.16 [95% CI, 0.05 to 0.27]) compared with children who did not have underweight in the first 2 years. CONCLUSIONS AND RELEVANCE: In this prospective cohort study, children with underweight in the first 2 years of life had lower zBMI and HAZ in later childhood. These associations were attenuated among children with a higher growth rate in the first 2 years. American Medical Association 2022-07-29 /pmc/articles/PMC9338407/ /pubmed/35904782 http://dx.doi.org/10.1001/jamanetworkopen.2022.24417 Text en Copyright 2022 South CA et al. JAMA Network Open. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the CC-BY License. |
spellingShingle | Original Investigation South, Courtney A. Keown-Stoneman, Charles D. G. Birken, Catherine S. Malik, Vasanti S. Zlotkin, Stanley H. Maguire, Jonathon L. Underweight in the First 2 Years of Life and Growth in Later Childhood |
title | Underweight in the First 2 Years of Life and Growth in Later Childhood |
title_full | Underweight in the First 2 Years of Life and Growth in Later Childhood |
title_fullStr | Underweight in the First 2 Years of Life and Growth in Later Childhood |
title_full_unstemmed | Underweight in the First 2 Years of Life and Growth in Later Childhood |
title_short | Underweight in the First 2 Years of Life and Growth in Later Childhood |
title_sort | underweight in the first 2 years of life and growth in later childhood |
topic | Original Investigation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9338407/ https://www.ncbi.nlm.nih.gov/pubmed/35904782 http://dx.doi.org/10.1001/jamanetworkopen.2022.24417 |
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