Fifty years of child height and weight in Japan and South Korea: Contrasting secular trend patterns analyzed by SITAR.
Fifty years of child height and weight in Japan and South Korea: Contrasting secular trend patterns analyzed by SITAR.
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DOI：
10.1002/ajhb.23054
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发表时间：
2018-01
期刊：
影响因子：
--
通讯作者：
Mori H
中科院分区：
文献类型：
--
作者：
Cole TJ;Mori H
日本人和韩国人传统上比欧洲人矮，但最近变得明显更高。目的是使用SITAR增长曲线模型量化两国50年来身高和体重增长的长期趋势模式。 方法在韩国（1965-2005年）和日本（1950-2010年）按10年获得1 - 20岁年龄组的平均身高和体重数据。这些数据是使用SITAR（平移和旋转叠加）进行分析的，它估计了一个平均曲线和三个调整-大小，时间和强度-反映了个人调查与平均值的差异。敏感性分析比较了基于队列和阶段的日本数据的结果。 结果在研究期间，这两个国家的生长模式发生了巨大变化，不仅影响身高和体重，而且影响发育年龄，因为生长期在时间上提前，在持续时间上缩短。SITAR很好地拟合了数据。这种趋势在韩国比日本更大，日本的青春期时间到1970年稳定下来。成年人的大部分身高增量在1.5岁时就已经增加了，而成年人的体重增量则在整个童年时期都在增加。 结论：这些国家的长期身高趋势代表了婴儿期长骨的增长，因此可以将其视为发育迟缓的逆趋势。各国在增长模式上存在显著差异，但这些差异不容易用国民收入、饮食或生活方式的差异来解释。
Objectives Japanese and South Koreans have traditionally been shorter than Europeans, but have recently become appreciably taller. The aim was to quantify the secular trend patterns in height and weight growth in the two countries over 50 years using the SITAR growth curve model. Methods Data on mean height and weight by sex in 1‐year age groups from 1 to 20 years were obtained by decade in South Korea (1965–2005) and Japan (1950–2010). The data were analyzed using SITAR (SuperImposition by Translation And Rotation), which estimates a mean curve and three adjustments–size, timing and intensity–reflecting how the individual surveys differ from the mean. A sensitivity analysis compared results for the Japanese data based on cohort as well as period. Results Growth patterns in the two countries changed dramatically over the study period, affecting not only height and weight but also developmental age, in that the growth period advanced in timing and shrank in duration. SITAR fitted the data well. The trends were larger in South Korea than Japan, and puberty timing in Japan stabilized by 1970. Most of the height increment seen in adults had already accrued by age 1.5 years, whereas the adult weight increment accrued throughout childhood. Conclusions The secular height trend in these countries represents increased growth in the long bones during infancy, so it can be viewed as the inverse of stunting. There are striking country differences in growth pattern, but they are not easily explained by differences in national income, diet or lifestyle.
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