A Performance Comparison of Maximum Contrast Methods to Detect Dose Dependency

A Performance Comparison of Maximum Contrast Methods to Detect Dose Dependency
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检测剂量依赖性的最大对比度方法的性能比较

DOI:
10.1177/009286159703100213
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发表时间:
1997
期刊:
Drug information journal : DIJ / Drug Information Association
影响因子:
--
通讯作者:
C. Hamada
C. Hamada
中科院分区:
--
文献类型:
--
作者:
I. Yoshimura;Akira Wakana;C. Hamada

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本文介绍了一种最大对比度法的概念,用于在单向布局中进行实验数据分析,其水平对应于测试化学品的剂量。它被定义为使用一组对比统计量的最大值来做出目标决策的方法,例如确定临床试验中的最小有效剂量(MED)、慢性毒性研究中的最小毒性剂量(MTD)或剂量-反应研究中的合理剂量-反应模式,其中,对比度统计量定义为剂量组的平均反应对比度与分子标准差的估计值之比。沿着这一概念,作者设计了一个扩展的威廉姆斯方法不相等的组大小,并比较了三种方法的性能:威廉姆斯方法,修改后的威廉姆斯方法,和最大-t方法,所有这些方法都经常被用来确定MTD的基础上新引入的损失函数。他们得出结论,改良的威廉姆斯方法相对更适合用于确定MTD,尽管每种方法都有其自身的优势模式。
This paper introduces the notion of a maximum contrast method for data analysis on experiments in a one-way layout with levels corresponding to doses of a test chemical. It is defined as the method which uses the maximum of a set of contrast statistics to make decisions for objectives, such as determining the minimum effective dose (MED) in clinical trials, the minimum toxic dose (MTD) in chronic toxicity studies, or a plausible dose-response pattern in dose-response studies, where a contrast statistic is defined as the ratio of a contrast of mean response for dose groups and an estimator of the standard deviation of the numerator. Along with this notion the authors devised an extended Williams method for unequal group sizes and compared the performance of three methods: the Williams method, a modified Williams method, and the max-t method, all of which are often used to identify the MTD based on a newly introduced loss function. They concluded that the modified Williams method is comparatively better for the purpose of identifying the MTD, although each method has its own advantageous pattern.
融合多元智能理论、以真实体验理解为目标的科学学习
DOI: --
发表时间: 2010
期刊: 日本教科教育学会第36回全国大会論文集
影响因子: --
作者:
Ryoko KODAMA;Miho KATO;Mariko ISHIGURO;玉村かおり・松本伸示
通讯作者: 玉村かおり・松本伸示