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得分检验的诊断统计量AI 解读

This article provides exact and approximate expressions for the change in the score test on deletion of observations. Deletions of individuals and of entire risk sets from matched case-control and survival studies are discussed in detail. A simple formula is derived, which measures the contribution of individual strata to score tests based on combining several contingency tables. The diagnostic is illustrated by application to the Stanford heart-transplant data.

This article provides exact and approximate expressions for the change in the score test on deletion of observations. Deletions of individuals and of entire risk sets from matched case-control and survival studies are discussed in detail. A simple formula is derived, which measures the contribution of individual strata to score tests based on combining several contingency tables. The diagnostic is illustrated by application to the Stanford heart-transplant data.

非线性回归诊断的几何方法及其在配对病例对照研究中的应用AI 解读

A geometric approach is described for the detection of influential points in nonlinear regression. This work extends and gives geometric interpretation to recent results in logistic regression diagnostics. An application of this approach to matched case-control studies is discussed.

生存分析中的时变协变量AI 解读

The log rank and modified Wilcoxon test statistics are two alternative methods of analysis for censored survival data. It is well known that the log rank test can be derived from the model of Cox (1972). This paper derives the Wilcoxon test as a special case of Cox's model with a time-dependent covariate.

生存分析中的时变协变量AI 解读

The log rank and modified Wilcoxon test statistics are two alternative methods of analysis for censored survival data. It is well known that the log rank test can be derived from the model of Cox (1972). This paper derives the Wilcoxon test as a special case of Cox's model with a time-dependent covariate.