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Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents

BACKGROUND: In Chile, indigenous and non-indigenous schoolchildren have the same stature when they begin school but indigenous adults are shorter, indicating the importance of analyzing growth during puberty. The aim of this study was to compare the growth of indigenous and non-indigenous girls duri...

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Autores principales: Amigo, Hugo, Lara, Macarena, Bustos, Patricia, Muñoz, Sergio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4323033/
https://www.ncbi.nlm.nih.gov/pubmed/25636484
http://dx.doi.org/10.1186/s12889-015-1389-y
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author Amigo, Hugo
Lara, Macarena
Bustos, Patricia
Muñoz, Sergio
author_facet Amigo, Hugo
Lara, Macarena
Bustos, Patricia
Muñoz, Sergio
author_sort Amigo, Hugo
collection PubMed
description BACKGROUND: In Chile, indigenous and non-indigenous schoolchildren have the same stature when they begin school but indigenous adults are shorter, indicating the importance of analyzing growth during puberty. The aim of this study was to compare the growth of indigenous and non-indigenous girls during the 36 months after menarche in Chile’s Araucanía Region. METHODS: A concurrent cohort study was conducted to compare growth in the two ethnic groups, which were comprised of 114 indigenous and 126 non-indigenous girls who recently experienced menarche and were randomly selected. Height was measured at menarche and at 6, 12, 18, 24 and 36 months post-menarche. General linear models were used to analyze growth and a generalized estimating equation model was used to compare height at 36 months post-menarche. RESULTS: At menarche, the Z-score of height/age was less for indigenous than non-indigenous girls (−0.01 vs. −0.61, p < 0.001). Indigenous girls grew at a slower rate than non-indigenous girls (6.5 vs. 7.2 cm, p = 0.02), and height at 36-months post-menarche reached −0.82 vs. -0.35 cm (p <0.001). In an adjusted model at 36 months post-menarche, indigenous girls were 1.6 cm shorter than non-indigenous girls (95% confidence interval: −3.13 to −0.04). CONCLUSIONS: The height of indigenous girls at menarche was lower than that of non-indigenous girls and they subsequently grew less, maintaining the gap between the two groups. At the end of the follow-up period, the indigenous girls were shorter than their non-indigenous peers.
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spelling pubmed-43230332015-02-11 Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents Amigo, Hugo Lara, Macarena Bustos, Patricia Muñoz, Sergio BMC Public Health Research Article BACKGROUND: In Chile, indigenous and non-indigenous schoolchildren have the same stature when they begin school but indigenous adults are shorter, indicating the importance of analyzing growth during puberty. The aim of this study was to compare the growth of indigenous and non-indigenous girls during the 36 months after menarche in Chile’s Araucanía Region. METHODS: A concurrent cohort study was conducted to compare growth in the two ethnic groups, which were comprised of 114 indigenous and 126 non-indigenous girls who recently experienced menarche and were randomly selected. Height was measured at menarche and at 6, 12, 18, 24 and 36 months post-menarche. General linear models were used to analyze growth and a generalized estimating equation model was used to compare height at 36 months post-menarche. RESULTS: At menarche, the Z-score of height/age was less for indigenous than non-indigenous girls (−0.01 vs. −0.61, p < 0.001). Indigenous girls grew at a slower rate than non-indigenous girls (6.5 vs. 7.2 cm, p = 0.02), and height at 36-months post-menarche reached −0.82 vs. -0.35 cm (p <0.001). In an adjusted model at 36 months post-menarche, indigenous girls were 1.6 cm shorter than non-indigenous girls (95% confidence interval: −3.13 to −0.04). CONCLUSIONS: The height of indigenous girls at menarche was lower than that of non-indigenous girls and they subsequently grew less, maintaining the gap between the two groups. At the end of the follow-up period, the indigenous girls were shorter than their non-indigenous peers. BioMed Central 2015-01-31 /pmc/articles/PMC4323033/ /pubmed/25636484 http://dx.doi.org/10.1186/s12889-015-1389-y Text en © Amigo et al.; licensee BioMed Central. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Amigo, Hugo
Lara, Macarena
Bustos, Patricia
Muñoz, Sergio
Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents
title Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents
title_full Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents
title_fullStr Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents
title_full_unstemmed Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents
title_short Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents
title_sort postmenarche growth: cohort study among indigenous and non-indigenous chilean adolescents
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4323033/
https://www.ncbi.nlm.nih.gov/pubmed/25636484
http://dx.doi.org/10.1186/s12889-015-1389-y
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