Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal

Background: A decline in the age of menarche was observed from early 1900s to the 1970s. However, it is not known if a further decline ocurred thereafter. Aim: To evaluate the age of menarche in girls from Santiago, Chile and its relationship with body mass index (BMI) and socioeconomic status. Mate...

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Autores principales:	Hernández,M Isabel, Unanue,Nancy, Gaete,Ximena, Cassorla,Fernando, Codner,Ethel
Lenguaje:	Spanish / Castilian
Publicado:	Sociedad Médica de Santiago 2007
Materias:	Body mass index Menarche Social class
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872007001100009
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spelling	oai:scielo:S0034-988720070011000092008-02-08Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporalHernández,M IsabelUnanue,NancyGaete,XimenaCassorla,FernandoCodner,Ethel Body mass index Menarche Social class Background: A decline in the age of menarche was observed from early 1900s to the 1970s. However, it is not known if a further decline ocurred thereafter. Aim: To evaluate the age of menarche in girls from Santiago, Chile and its relationship with body mass index (BMI) and socioeconomic status. Material and Methods: We studied 1302 healthy girls aged 7 to 19 years. Age of menarche was evaluated through a questionnaire to the patient and her parents. Kaplan-Meier curves were used to determine age of menarche and Cox regression analysis was employed to evaluate the effect of the type of school and BMI on the age of menarche. Results: The mean age at menarche was 12.7±0.04 years. Girls from public and private schools had their period at 12.5±0.1 and 13.05±0.05 years respectively. A negative correlation between z scores for BMIand age of menarche was observed (r-0.3: p =0.001). Girls whose menarche occurred before 11.5 years had higher z scores for BMI and a larger proportion were overweight, compared to girls who had menarche later. Cox regression analysis showed that after adjusment for BMI, age of menarche was similar in both types of schools. Conclusions: Age of menarche is ocurring three months earlier in girls from public schools, which is associated with higher z scores for BMI. Type of school, a marker of socio-economic status in Chile, affects timing of menarche due to differences in body mass indexinfo:eu-repo/semantics/openAccessSociedad Médica de SantiagoRevista médica de Chile v.135 n.11 20072007-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872007001100009es10.4067/S0034-98872007001100009
institution	Scielo Chile
collection	Scielo Chile
language	Spanish / Castilian
topic	Body mass index Menarche Social class
spellingShingle	Body mass index Menarche Social class Hernández,M Isabel Unanue,Nancy Gaete,Ximena Cassorla,Fernando Codner,Ethel Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
description	Background: A decline in the age of menarche was observed from early 1900s to the 1970s. However, it is not known if a further decline ocurred thereafter. Aim: To evaluate the age of menarche in girls from Santiago, Chile and its relationship with body mass index (BMI) and socioeconomic status. Material and Methods: We studied 1302 healthy girls aged 7 to 19 years. Age of menarche was evaluated through a questionnaire to the patient and her parents. Kaplan-Meier curves were used to determine age of menarche and Cox regression analysis was employed to evaluate the effect of the type of school and BMI on the age of menarche. Results: The mean age at menarche was 12.7±0.04 years. Girls from public and private schools had their period at 12.5±0.1 and 13.05±0.05 years respectively. A negative correlation between z scores for BMIand age of menarche was observed (r-0.3: p =0.001). Girls whose menarche occurred before 11.5 years had higher z scores for BMI and a larger proportion were overweight, compared to girls who had menarche later. Cox regression analysis showed that after adjusment for BMI, age of menarche was similar in both types of schools. Conclusions: Age of menarche is ocurring three months earlier in girls from public schools, which is associated with higher z scores for BMI. Type of school, a marker of socio-economic status in Chile, affects timing of menarche due to differences in body mass index
author	Hernández,M Isabel Unanue,Nancy Gaete,Ximena Cassorla,Fernando Codner,Ethel
author_facet	Hernández,M Isabel Unanue,Nancy Gaete,Ximena Cassorla,Fernando Codner,Ethel
author_sort	Hernández,M Isabel
title	Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
title_short	Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
title_full	Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
title_fullStr	Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
title_full_unstemmed	Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
title_sort	edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal
publisher	Sociedad Médica de Santiago
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872007001100009
work_keys_str_mv	AT hernandezmisabel edaddelamenarquiaysurelacionconelnivelsocioeconomicoeindicedemasacorporal AT unanuenancy edaddelamenarquiaysurelacionconelnivelsocioeconomicoeindicedemasacorporal AT gaeteximena edaddelamenarquiaysurelacionconelnivelsocioeconomicoeindicedemasacorporal AT cassorlafernando edaddelamenarquiaysurelacionconelnivelsocioeconomicoeindicedemasacorporal AT codnerethel edaddelamenarquiaysurelacionconelnivelsocioeconomicoeindicedemasacorporal
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Edad de la menarquia y su relación con el nivel socioeconómico e índice de masa corporal

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