Bias correction for score tests arising from misspecified proportional hazards regression models

Bias correction for score tests arising from misspecified proportional hazards regression models
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对因错误指定的比例风险回归模型而产生的分数测试进行偏差校正

DOI:
10.1093/biomet/88.2.421
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发表时间:
2001
期刊:
影响因子:
2.7
通讯作者:
S. Lagakos
S. Lagakos
中科院分区:
数学2区
文献类型:
--
作者:
A. DiRienzo;S. Lagakos

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当删失取决于治疗组和协变量时,由考克斯比例风险模型产生的随机化治疗效应检验通常不会集中在零下,并且可能严重失真。我们提出了一个修正的测试,修改的风险指标的方式,纠正这种偏见。无论是否正确指定拟合模型,所得检验均渐近有效。校正检验的实施要求对删失对治疗组和协变量的依赖性进行建模。模拟表明,偏差校正的测试表现良好,即使当删失对治疗组和协变量的依赖性没有被精确建模时,并且当后者有效时,相对于未校正的测试保持高效率。
When censoring depends on both treatment group and covariates, tests for a randomised treatment effect arising from Cox's proportional hazards model are not in general centred at zero under the null and can be seriously distorted. We propose a corrected test that modifies the at-risk indicator in a way that corrects for this bias. The resulting test is asymptotically valid regardless of whether or not the fitted model is correctly specified. Implementation of the corrected test requires that the dependence of censoring on treatment group and covariates be modelled. Simulations indicate that the bias-corrected test performs well, even when the dependence of censoring on treatment group and covariates is not modelled exactly, and maintains high efficiency relative to the uncorrected test when the latter is valid.
DOI: 10.2307/2531154
发表时间: 1984-01-01
期刊: BIOMETRICS
影响因子: 1.9
作者:
LAGAKOS, SW;SCHOENFELD, DA
通讯作者: SCHOENFELD, DA
DOI: --
发表时间: 1972
期刊: --
影响因子: --
作者:
D. Cox
通讯作者: D. Cox