Family socio-economic background modified secular trends in age at menarche: evidence from the Pro-Saude Study (Rio de Janeiro, Brazil)
Family socio-economic background modified secular trends in age at menarche: evidence from the Pro-Saude Study (Rio de Janeiro, Brazil)
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DOI：
10.1080/0301446031000091783
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发表时间：
2003-05-01
影响因子：
1.7
通讯作者：
Werneck, GL
中科院分区：
文献类型：
--
作者：
do Lago, MJ;Faerstein, E;Werneck, GL
背景：由于初潮年龄与社会经济地位有关，因此，初潮年龄的下降趋势可能会因女性童年时期所处家庭的社会经济地位水平的不同而有所不同。目的：本研究旨在描述父亲受教育程度不同的巴西妇女初潮年龄的长期趋势。结果：初潮年龄7~19岁，平均12.3岁(+/-1.64 SD)。所有女性的初潮年龄平均每十年减少2.4个月。在受过8年以下教育的父亲的女儿中，这一下降是每十年3.6个月，而在父亲受过8年或以上教育的女儿中，这一下降是每十个月1.2个月。结论：过去几十年来，巴西生活条件的改善似乎对童年生活在较差的社会经济条件下的妇女的初潮年龄的降低产生了更大的影响。
Background : Since age at menarche has been associated with socio-economic status, its downward secular trend might vary according to the different socio-economic status levels of the family in which women lived during their childhood.Aim : This study seeks to describe secular trends in age at menarche for Brazilian women whose fathers had different levels of educational attainment.Subjects and methods : A self-administered questionnaire was applied to 2053 women born between 1931 and 1977. Multiple linear regression models were employed to estimate trends in age at menarche according to categories of educational level of the participants' father.Results : The age at first menstruation varied from 7 to 19 years, with a mean age of 12.3 years (+/- 1.64 SD). The reduction in age at menarche was 2.4 months per decade for all women. Among daughters of fathers with less than 8 years of schooling this reduction was 3.6 months per decade, and among daughters of fathers with 8 years or more of study it was 1.2 months per decade.Conclusion : Improvements in living conditions in Brazil over the last decades seem to have had a stronger effect on the reduction of the age at menarche among women who lived their childhood in worse socio-economic standards.