A continuous-scale measure of child development for population-based epidemiological surveys: a preliminary study using Item Response Theory for the Denver Test.

Drachler-Mde L; Marshall T; de-Carvalho-Leite JC

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A continuous-scale measure of child development for population-based epidemiological surveys: a preliminary study using Item Response Theory for the Denver Test.

机译：一项基于人口的流行病学调查的儿童发展的连续规模测量：使用项目反应理论进行丹佛检验的初步研究。

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A method for translating research data from the Denver Test into individual scores of developmental status measured in a continuous scale is presented. It was devised using the Denver Developmental Screening Test (DDST) but can be used for Denver II. The DDST was applied in a community-based survey of 3389 under-5-year-olds in Porto Alegre, Brazil. The items of success were standardised by logistic regression on log chronological age. Each child's ability age was then estimated by maximum likelihood as the age in this reference population corresponding to the child's success and failures in the test. The score of developmental status is the natural logarithm of this ability age divided by chronological age and thus measures the delay or advance in the child's ability age compared with chronological age. This method estimates development status using both difficulty and discriminating power of each item in the reference population, an advantage over scores based on total number of items correctly performed or failed, which depend on difficulty only. The score corresponds with maternal opinion of child developmental status and with the 3-category scale of the DDST. It shows good construct validity, indicated by symmetrical and homogeneous variability from 3 months upwards, and reasonable results in describing gender differences in development by age, the mean score increasing with socio-economic conditions and diminishing among low-birthweight children. If a standardised measure of development status (z-scores) is required, this can be obtained by dividing the score by its standard deviation. Concurrent and discriminant validity of the score must be examined in further studies.

机译：提出了一种将来自丹佛测验的研究数据转化为以连续量表测量的各个发育状况分数的方法。它是使用丹佛发育筛查测试（DDST）设计的，但可用于丹佛II。在巴西阿雷格里港（Porto Alegre）的3389岁以下5岁以下人群的社区调查中使用了DDST。通过对数时间顺序的逻辑回归对成功项目进行标准化。然后，通过最大似然估计每个孩子的能力年龄，因为该参考人群中的年龄对应于该孩子在测试中的成功和失败。发育状况的得分是该能力年龄的自然对数除以时间年龄，因此可以衡量儿童能力年龄与时间年龄相比的延迟或进展。这种方法使用参考人群中每个项目的难度和判别力来估计开发状态，这是基于正确执行或失败的项目总数（仅取决于难度）的得分优势。该分数与母亲对儿童发育状况的看法以及DDST的3类量表相对应。它显示出良好的结构效度，从3个月起呈对称且均一的变异性，并在描述按年龄发展的性别差异方面具有合理的结果，平均分随着社会经济条件的增加而增加，而低体重儿童则有所减少。如果需要对发展状况进行标准化测量（z评分），可以通过将分数除以其标准偏差来获得。分数的同时性和判别有效性必须在进一步研究中进行检查。

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《Paediatric and perinatal epidemiology》 |2007年第2期|共16页
作者
Drachler-Mde L; Marshall T; de-Carvalho-Leite JC;
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正文语种 eng
中图分类流行病学与防疫;
关键词
Age; NOS; Child; development aspects; Item Response Theory; 儿童;

机译：年龄;NOS;儿童;发展方面;项目反应理论;儿童;

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1. A continuous-scale measure of child development for population-based epidemiological surveys: a preliminary study using Item Response Theory for the Denver Test. [J] . Drachler-Mde L, Marshall T, de-Carvalho-Leite JC Paediatric and perinatal epidemiology . 2007,第2期

机译：一项基于人口的流行病学调查的儿童发展的连续规模测量：使用项目反应理论进行丹佛检验的初步研究。
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A continuous-scale measure of child development for population-based epidemiological surveys: a preliminary study using Item Response Theory for the Denver Test.

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