Related Experiment Video
Updated: Oct 3, 2026

Establishing a Competing Risk Regression Nomogram Model for Survival Data
Published on: October 23, 2020
A qualitative discrepancy between censored data rank tests
Abstract:
Two popular censored data rank tests were used to compare cancer incidence rates between dogs receiving bone marrow transplantation and control dogs. The logrank test gave a significance level of 0.01. In contrast, Gehan's generalized Wilcoxon test gave a significance level of 0.76. The statistics are displayed in a manner that shows how such contrasting significance levels can arise. The Gehan statistic is shown to be subject to a serious criticism that does not apply to other Wilcoxon generalizations. Further insight into the data is obtained using a time-dependent logrank test and the proportional hazards regression model.
Related Concept Videos
Ranks
Wilcoxon Signed-Ranks Test for Matched Pairs
Wilcoxon Rank-Sum Test
Friedman Two-way Analysis of Variance by Ranks
The Mantel-Cox Log-Rank Test
Censoring Survival Data

