Age at spermarche: 15-year trend and its association with body mass index in Chinese school-aged boys
Age at spermarche: 15-year trend and its association with body mass index in Chinese school-aged boys
复制标题
中国学龄男孩初射年龄：15年趋势及其与体重指数的关系
DOI：
10.1111/ijpo.12073
复制
发表时间：
2016-10-01
影响因子：
3.8
通讯作者：
Agardh, A.
中科院分区：
文献类型：
--
作者：
Song, Y.;Ma, J.;Agardh, A.
BackgroundLittle is known about the secular trends in age at spermarche among boys, and the association between body mass index (BMI) and male puberty is controversial.ObjectiveThis study aimed to estimate the trend in age at spermarche in China and explore the association of spermarche with BMI.MethodsWe used four cross-sectional Chinese National Surveys on Students' Constitution and Health (CNSSCH; 1995, 2000, 2005 and 2010). Median age at spermarche was determined using probit analysis. Logistic regression was used to assess the association of spermarche with BMI.ResultsAge at spermarche among Chinese boys dropped from 14.57 to 14.03 years from 1995 to 2010 with a decrease of 4.3 months per decade. Boys with BMI-for-age z-score lower than -2 had the latest age at spermarche. A higher BMI or BMI-for-age z-score was associated with an increased likelihood of having reached spermarche, and this association was consistently observed at all survey points.ConclusionThis study provides important evidence of a secular trend of earlier age at spermarche over the past 15 years in China, and this decrease was accompanied by a simultaneous increase in BMI. Strategies and interventions focusing on thinness may promote both their nutritional status and puberty development among Chinese boys.
