Abstract
For comparison of two survival distributions, it is natural to use a weighted log-rank test with weight function given by the log hazard ratio function that is anticipated a priori. This paper investigates the efficiency of this test when the a priori estimate of the log hazard ratio is subject to a specified percentage error. The test is shown to be the maximin efficiency robust test over the class of alternatives in question and a simple expression for the maximin efficiency is established.
Original language | English |
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Pages (from-to) | 893-899 |
Number of pages | 7 |
Journal | Biometrics |
Volume | 48 |
Issue number | 3 |
DOIs | |
State | Published - 1992 |