arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1708.04792stat.MEstat.AP
收藏

使用剂量递增和过量控制比较连续和离散剂量

Comparison between continuous and discrete doses using Escalation With Overdose Control

Márcio Augusto Diniz, Mourad Tighiouart, André Rogatko

摘要:

虽然有大量的统计学文献显示了离散化连续变量的缺点,但分类是临床研究中的常见做法,导致大量信息丢失。癌症I期临床试验设计中的大量方法将新药剂量确定为离散变量。一个值得注意的例外是有过量控制的递增(EWOC)设计,其中剂量可以定义为连续或离散剂量网格。进行了蒙特卡罗模拟研究,以比较连续和离散剂量EWOC设计的操作特性。考虑了四个具有不同间隔长度的等距网格。除了通常的偏倚和均方误差统计测量外,还通过临床医生更容易解释的几个操作特征来测量信息损失。基于模拟,如果没有足够的关于真实MTD值的知识,如I期临床试验中常见的那样,连续给药方案是一个有吸引力的选择。

英文摘要:

Although there is an extensive statistical literature showing the disadvantages of discretizing continuous variables, categorization is a common practice in clinical research which results in substantial loss of information. A large collection of methods in cancer phase I clinical trial design establishes dose of a new agent as a discrete variable. A noteworthy exception is the Escalation With Overdose Control (EWOC) design, where doses can be defined either as continuous or as a grid of discrete doses. A Monte Carlo simulation study was performed to compare the operating characteristics of continuous and discrete dose EWOC designs. Four equally spaced grids with different interval lengths were considered. The loss of information was measured by several operating characteristics easier for clinicians to interpret, in addition to the usual statistical measures of bias and mean squared error. Based on the simulations, if there is not enough knowledge about the true MTD value as commonly happens in phase I clinical trials, continuous dose scheme arises as an attractive option.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑