Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.

<h4>Background</h4>Entering puberty is an important milestone in reproductive life and secular changes in the timing of puberty may be an important indicator of the general reproductive health in a population. Too early puberty is associated with several psychosocial and health problems....

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Autores principales:	Lise Aksglaede, Lina W Olsen, Thorkild I A Sørensen, Anders Juul
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e70c5cd9b8414cc1bd694fd654e41db2
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spelling	oai:doaj.org-article:e70c5cd9b8414cc1bd694fd654e41db22021-11-25T06:11:38ZForty years trends in timing of pubertal growth spurt in 157,000 Danish school children.1932-620310.1371/journal.pone.0002728https://doaj.org/article/e70c5cd9b8414cc1bd694fd654e41db22008-07-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18628945/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Entering puberty is an important milestone in reproductive life and secular changes in the timing of puberty may be an important indicator of the general reproductive health in a population. Too early puberty is associated with several psychosocial and health problems. The aim of our study was to determine if the age at onset of pubertal growth spurt (OGS) and at peak height velocity (PHV) during puberty show secular trends during four decades in a large cohort of school children.<h4>Methods and findings</h4>Annual measurements of height were available in all children born from 1930 to 1969 who attended primary school in the Copenhagen Municipality. 135,223 girls and 21,612 boys fulfilled the criteria for determining age at OGS and age at PHV. These physiological events were used as markers of pubertal development in our computerized method in order to evaluate any secular trends in pubertal maturation during the study period (year of birth 1930 to 1969). In this period, age at OGS declined statistically significantly by 0.2 and 0.4 years in girls and boys, respectively, whereas age at PHV declined statistically significantly by 0.5 and 0.3 years in girls and boys, respectively. The decline was non-linear with a levelling off in the children born between 1940 and 1955. The duration of puberty, as defined by the difference between age at OGS and age at PHV, increased slightly in boys, whereas it decreased in girls.<h4>Conclusion</h4>Our finding of declining age at OGS and at PHV indicates a secular trend towards earlier sexual maturation of Danish children born between 1930 and 1969. Only minor changes were observed in duration of puberty assessed by the difference in ages at OGS and PHV.Lise AksglaedeLina W OlsenThorkild I A SørensenAnders JuulPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 7, p e2728 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lise Aksglaede Lina W Olsen Thorkild I A Sørensen Anders Juul Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.
description	<h4>Background</h4>Entering puberty is an important milestone in reproductive life and secular changes in the timing of puberty may be an important indicator of the general reproductive health in a population. Too early puberty is associated with several psychosocial and health problems. The aim of our study was to determine if the age at onset of pubertal growth spurt (OGS) and at peak height velocity (PHV) during puberty show secular trends during four decades in a large cohort of school children.<h4>Methods and findings</h4>Annual measurements of height were available in all children born from 1930 to 1969 who attended primary school in the Copenhagen Municipality. 135,223 girls and 21,612 boys fulfilled the criteria for determining age at OGS and age at PHV. These physiological events were used as markers of pubertal development in our computerized method in order to evaluate any secular trends in pubertal maturation during the study period (year of birth 1930 to 1969). In this period, age at OGS declined statistically significantly by 0.2 and 0.4 years in girls and boys, respectively, whereas age at PHV declined statistically significantly by 0.5 and 0.3 years in girls and boys, respectively. The decline was non-linear with a levelling off in the children born between 1940 and 1955. The duration of puberty, as defined by the difference between age at OGS and age at PHV, increased slightly in boys, whereas it decreased in girls.<h4>Conclusion</h4>Our finding of declining age at OGS and at PHV indicates a secular trend towards earlier sexual maturation of Danish children born between 1930 and 1969. Only minor changes were observed in duration of puberty assessed by the difference in ages at OGS and PHV.
format	article
author	Lise Aksglaede Lina W Olsen Thorkild I A Sørensen Anders Juul
author_facet	Lise Aksglaede Lina W Olsen Thorkild I A Sørensen Anders Juul
author_sort	Lise Aksglaede
title	Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.
title_short	Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.
title_full	Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.
title_fullStr	Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.
title_full_unstemmed	Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.
title_sort	forty years trends in timing of pubertal growth spurt in 157,000 danish school children.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/e70c5cd9b8414cc1bd694fd654e41db2
work_keys_str_mv	AT liseaksglaede fortyyearstrendsintimingofpubertalgrowthspurtin157000danishschoolchildren AT linawolsen fortyyearstrendsintimingofpubertalgrowthspurtin157000danishschoolchildren AT thorkildiasørensen fortyyearstrendsintimingofpubertalgrowthspurtin157000danishschoolchildren AT andersjuul fortyyearstrendsintimingofpubertalgrowthspurtin157000danishschoolchildren
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Forty years trends in timing of pubertal growth spurt in 157,000 Danish school children.

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