Secular trends: 10 and 20-year comparisons of sexual maturation among students
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng por |
Título da fonte: | Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
Texto Completo: | https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680 |
Resumo: | The objective of this study was to verify the secular trends of sexual maturation of students between 11 and 15 years old, during a period of 10 and 20 years. The sample was composed by 1,002 students aged between 11 and 15 years; 536 boys (12.6±1.3 years old) and 466 girls (12.5±1.2 years old) who took part in the Ilhabela Mixed-Longitudinal Project on Growth, Development, and Physical Fitness. The students’ assessment period occurred in 1990/91 (initial), 2000/01 (10 years later), and 2009/10 (20 years later). Sexual maturation was analyzed according to the self-assessment method and age at menarche (month and year) was collected retrospectively. The statistical analysis used was: one-way ANOVA, and Tukey’s post-hoc test. The level of significance was p<0.01. The onset of menarche in the initial analysis was at: 12.5±1.2 years old; in the 2000/01 group: 12.3±1.0 years old (Δ=-1.6%), and in the 2009/10 group: 12.2±1.0 years old (Δ=-2.4%). Although there was a tendency towards reduction in age at menarche along the periods investigated, differences were not significant. There were significant differences only in genitals (G4), and pubic hair (P3) in boys after 10 and 20 years. In the same period, it did not occur any significant difference in maturational stages for girls. In conclusion, there was no secular trend of secondary sexual characteristics in boys (genital and pubic hair) and girls (breast and pubic hair) and in age at menarche over 10 and 20 years. |
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Secular trends: 10 and 20-year comparisons of sexual maturation among studentsTendência secular de 10 e 20 anos da maturação sexual de escolaresThe objective of this study was to verify the secular trends of sexual maturation of students between 11 and 15 years old, during a period of 10 and 20 years. The sample was composed by 1,002 students aged between 11 and 15 years; 536 boys (12.6±1.3 years old) and 466 girls (12.5±1.2 years old) who took part in the Ilhabela Mixed-Longitudinal Project on Growth, Development, and Physical Fitness. The students’ assessment period occurred in 1990/91 (initial), 2000/01 (10 years later), and 2009/10 (20 years later). Sexual maturation was analyzed according to the self-assessment method and age at menarche (month and year) was collected retrospectively. The statistical analysis used was: one-way ANOVA, and Tukey’s post-hoc test. The level of significance was p<0.01. The onset of menarche in the initial analysis was at: 12.5±1.2 years old; in the 2000/01 group: 12.3±1.0 years old (Δ=-1.6%), and in the 2009/10 group: 12.2±1.0 years old (Δ=-2.4%). Although there was a tendency towards reduction in age at menarche along the periods investigated, differences were not significant. There were significant differences only in genitals (G4), and pubic hair (P3) in boys after 10 and 20 years. In the same period, it did not occur any significant difference in maturational stages for girls. In conclusion, there was no secular trend of secondary sexual characteristics in boys (genital and pubic hair) and girls (breast and pubic hair) and in age at menarche over 10 and 20 years.O objetivo do presente foi verificar a tendência secular da maturação sexual de escolares de 11 a 15 anos de idade, nos períodos de 10 e 20 anos. Foram envolvidos no estudo 1.002 escolares com idade entre 11 e 15 anos; 536 meninos (12,6±1,3 anos) e 466 meninas (12,5±1,2 anos), que participaram do Projeto Longitudinal Misto de Crescimento, Desenvolvimento e Aptidão Física de Ilhabela. Os escolares foram avaliados nos períodos de 1990/91 (Inicial), 2000/01 (10 anos) e 2009/10 (20 anos). A maturação sexual foi realizada de acordo com o método de autoavaliação. A idade de menarca (mês e ano) foi obtida pelo método retrospectivo. A análise estatística utilizada foi Anova “one way” seguido do post hoc de Tukey. O nível de significância adotado foi p<0,01. O início da idade de menarca foi: 12,5±1,2 anos; no grupo 10 anos: 12,3±1,0 (Δ= -1,6%); e no grupo 20 anos: 12,2±1,0 anos (Δ= -2,4%). Embora tenha ocorrido um declínio na idade de menarca durante os períodos, não houve diferença significante. Houve diferença significante somente em genitais (G4), e pelos púbicos (P3) em meninos após 10 e 20 anos. No mesmo período, não ocorreu diferença significante nos estágios maturacionais nas meninas. Concluiu-se que a tendência secular das características sexuais secundárias dos meninos (genital e pelos púbicos) e nas meninas (mamas e pelos púbicos) e idade de menarca foi nula no período de 10 e 20 anos.Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil2012-10-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion"Avaliado por Pares",Comparative studyAvaliado por ParesTipo Descritivaapplication/pdfapplication/pdfhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p68010.1590/1980-0037.2012v14n6p680Brazilian Journal of Kinanthropometry and Human Performance; Vol. 14 No. 6 (2012); 680-689Revista Brasileira de Cineantropometria e Desempenho Humano; v. 14 n. 6 (2012); 680-6891980-00371415-8426reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCengporhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680/23095https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680/23094Farias, Rodrigo MateusMatsudo, Sandra Marcela MahechaFerrari, Gerson Luis MoraesMatsudo, Victor Keihan Rodriguesinfo:eu-repo/semantics/openAccess2022-11-21T14:14:57Zoai:periodicos.ufsc.br:article/24756Revistahttps://periodicos.ufsc.br/index.php/rbcdh/PUBhttps://periodicos.ufsc.br/index.php/rbcdh/oairbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br1980-00371415-8426opendoar:2022-11-21T14:14:57Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
Secular trends: 10 and 20-year comparisons of sexual maturation among students Tendência secular de 10 e 20 anos da maturação sexual de escolares |
title |
Secular trends: 10 and 20-year comparisons of sexual maturation among students |
spellingShingle |
Secular trends: 10 and 20-year comparisons of sexual maturation among students Farias, Rodrigo Mateus |
title_short |
Secular trends: 10 and 20-year comparisons of sexual maturation among students |
title_full |
Secular trends: 10 and 20-year comparisons of sexual maturation among students |
title_fullStr |
Secular trends: 10 and 20-year comparisons of sexual maturation among students |
title_full_unstemmed |
Secular trends: 10 and 20-year comparisons of sexual maturation among students |
title_sort |
Secular trends: 10 and 20-year comparisons of sexual maturation among students |
author |
Farias, Rodrigo Mateus |
author_facet |
Farias, Rodrigo Mateus Matsudo, Sandra Marcela Mahecha Ferrari, Gerson Luis Moraes Matsudo, Victor Keihan Rodrigues |
author_role |
author |
author2 |
Matsudo, Sandra Marcela Mahecha Ferrari, Gerson Luis Moraes Matsudo, Victor Keihan Rodrigues |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Farias, Rodrigo Mateus Matsudo, Sandra Marcela Mahecha Ferrari, Gerson Luis Moraes Matsudo, Victor Keihan Rodrigues |
description |
The objective of this study was to verify the secular trends of sexual maturation of students between 11 and 15 years old, during a period of 10 and 20 years. The sample was composed by 1,002 students aged between 11 and 15 years; 536 boys (12.6±1.3 years old) and 466 girls (12.5±1.2 years old) who took part in the Ilhabela Mixed-Longitudinal Project on Growth, Development, and Physical Fitness. The students’ assessment period occurred in 1990/91 (initial), 2000/01 (10 years later), and 2009/10 (20 years later). Sexual maturation was analyzed according to the self-assessment method and age at menarche (month and year) was collected retrospectively. The statistical analysis used was: one-way ANOVA, and Tukey’s post-hoc test. The level of significance was p<0.01. The onset of menarche in the initial analysis was at: 12.5±1.2 years old; in the 2000/01 group: 12.3±1.0 years old (Δ=-1.6%), and in the 2009/10 group: 12.2±1.0 years old (Δ=-2.4%). Although there was a tendency towards reduction in age at menarche along the periods investigated, differences were not significant. There were significant differences only in genitals (G4), and pubic hair (P3) in boys after 10 and 20 years. In the same period, it did not occur any significant difference in maturational stages for girls. In conclusion, there was no secular trend of secondary sexual characteristics in boys (genital and pubic hair) and girls (breast and pubic hair) and in age at menarche over 10 and 20 years. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-10-18 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion "Avaliado por Pares", Comparative study Avaliado por Pares Tipo Descritiva |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680 10.1590/1980-0037.2012v14n6p680 |
url |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680 |
identifier_str_mv |
10.1590/1980-0037.2012v14n6p680 |
dc.language.iso.fl_str_mv |
eng por |
language |
eng por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680/23095 https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2012v14n6p680/23094 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil |
publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil |
dc.source.none.fl_str_mv |
Brazilian Journal of Kinanthropometry and Human Performance; Vol. 14 No. 6 (2012); 680-689 Revista Brasileira de Cineantropometria e Desempenho Humano; v. 14 n. 6 (2012); 680-689 1980-0037 1415-8426 reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
collection |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
rbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br |
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1789435123013255168 |