Short-term growth in healthy infants, schoolchildren and adolescent girls
Short-term growth in healthy infants, schoolchildren and adolescent girls
复制标题
DOI：
10.1080/03014460500525369
复制
发表时间：
2006-03-01
影响因子：
1.7
通讯作者：
Lejarraga, H
中科院分区：
文献类型：
--
作者：
Caino, S;Kelmansky, D;Lejarraga, H
背景资料：现在大多数研究者都同意这样一个事实，即在短时期内测量的增长是一个不规则和非线性的过程。然而，与这一过程有关的许多方面仍然存在争议，例如，每天变化的连续性或不连续性以及生长模式中年龄差异的存在程度。目的：在这项研究中，我们分析和比较了三个健康儿童样本的身高生长，这些样本是基于日常测量的：8名婴儿（1）、16名学龄儿童（S）和10名青春期少女（A）。在128天内，每周5次使用哈彭登仪器和标准化技术测量站立高度或仰卧位长度。一个跳跃保持平滑技术，基于测量技术误差（TEM）与硬拒绝标准被用来分析我们的数据。TEM在0.08和0.20 cm之间变化。结果：发现了三种类型的事件：（1）停滞（平滑值的变化连续7天或更长时间内与零不可区分），（2）急剧变化（任何每日增量大于0.3 cm超过1天），和（3）连续生长（小，随着时间的推移持续增量）。这三种类型存在于所有的婴儿，青少年和学龄儿童，除了四名学龄儿童谁没有显示出急剧的变化。在三个样本中，陡峭的变化占研究期间总增长的32.7%（r = 15.3 - 54.5%）。样品I、S和A的1天急剧变化的平均数分别为4.4、1.4和2.1。样品I、S和A的平均停滞期数分别为3.0、2.9和4.3。在一名婴儿和一名学童中观察到的最长停滞期为连续28天。平均数的急剧变化，每个孩子显着更大的infants.Conclusion：我们的研究结果支持的概念，生长作为一个非线性和不规则的过程与三种现象：停滞，急剧变化和持续增长存在于所有年龄，包括婴儿期，学龄期和青春期。
Background: There is agreement amongst most investigators now on the fact that growth, when measured over short periods, is an irregular and non- linear process. However, many aspects related to this process still remain controversial, for example, the continuity or discontinuity of the daily changes and the degree of existence of age differences in growth patterns.Aim: In this study we analyse and compare growth in height based on daily measurements in three samples of healthy children: Eight infants ( 1), 16 schoolchildren ( S) and 10 adolescent girls during their pubertal growth spurt ( A).Subjects and methods: Standing height or supine length were measured five times a week during 128 days, with Harpenden instruments and standardized techniques. A jump- preserving smoothing technique, based on the technical error of measurement ( TEM) with a hard rejection criterion was used to analyse our data. TEM varied between 0.08 and 0.20 cm.Results: Three types of events were found: ( 1) stasis ( changes in smoothed values indistinguishable from zero over 7 or more consecutive days), ( 2) steep changes ( any daily increment greater than 0.3 cm over 1 day), and ( 3) continuous growth ( small, and continued increments over time). The three types were present in all infants, adolescents and schoolchildren, with the exception of four schoolchildren who did not show steep changes. In the three samples, steep changes accounted for 32.7% ( r = 15.3 - 54.5%) of the total growth during the study period. Mean numbers of 1- day steep changes were 4.4, 1.4 and 2.1 for samples I, S and A, respectively. Mean numbers of stasis periods were 3.0, 2.9 and 4.3 for samples I, S and A, respectively. The longest stasis period observed was 28 consecutive days in one infant and one school child. Mean number of steep changes per child was significantly greater in infants.Conclusion: Our findings support the concept of growth as a non- linear and irregular process with three phenomena: Stasis, steep changes and continuous growth present in all ages, including infancy, school age and adolescence.