词汇扩展:在队列研究中分析时间变化变量的先决条件。

IF 1.7 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

Nepal Journal of Epidemiology Pub Date : 2017-06-30 eCollection Date: 2017-06-01 DOI:10.3126/nje.v7i2.17974

Nitika, Sidharth Sekhar Mishra, Pallavi Lohani

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引用次数: 6

摘要

在前瞻性分析队列研究或涉及较长随访的研究中，改变参与者的年龄会影响暴露与结果之间的关系。通常在回归模型中加入入职年龄来调整年龄。然而，这并不能完全解释和调整年龄的变化。对于这个Lexis扩展，Wilhelm Lexis提出了一个概念，允许分析人员根据年龄范围扩展观察结果，并通过改变年龄来检查混淆和相互作用。词汇扩展假定在一个年龄范围内的比率是恒定的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Lexis Expansion: a prerequisite for analyzing time changing variables in a cohort study.

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Lexis Expansion: a prerequisite for analyzing time changing variables in a cohort study.

In a prospective analytical cohort study or a study involving a longer follow up, changing age of participants influence the relationship between exposure and outcome. Usually age at entry is incorporated in the regression model to adjust for age. However, this fails to fully explain and adjust for changing age. For this Lexis expansion, a concept by Wilhelm Lexis, allows the analyst to expand the observations as per age bands and check for confounding and interaction by changing age. Lexis expansion assumes the rates to be constant within an age band.

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来源期刊

Nepal Journal of Epidemiology PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH-

自引率

10.30%

发文量

期刊介绍： The Nepal Journal of Epidemiology is a international journal that encompasses all aspects of epidemiology. The journal encourages communication among those engaged in the research, teaching, and application of epidemiology of both communicable and non-communicable disease, including research into health services and medical care. Also covered are new methods, epidemiological and statistical, for the analysis of data used by those who practise social and preventive medicine. It provides the most up-to-date, original, well designed, well interpreted and significant information source in the multidisciplinary field of epidemiology. We publish manuscripts based on the following sections: 1.Short communications 2.Current research trends 3.Original research 4.Case reports 5.Review articles 6.Letter to editor