Sample size calculation for rank tests comparing K survival distributions.

Journal Article (Journal Article)

Rank tests, such as logrank or Wilcoxon rank sum tests, have been popularly used to compare survival distributions of two or more groups in the presence of right censoring. However, there has been little research on sample size calculation methods for rank tests to compare more than two groups. An existing method is based on a crude approximation, which tends to underestimate sample size, i.e., the calculated sample size has lower power than projected. In this paper we propose an asymptotically correct method and an approximate method for sample size calculation. The proposed methods are compared to other methods through simulation studies.

Full Text

Duke Authors

Cited Authors

  • Jung, S-H; Hui, S

Published Date

  • December 2002

Published In

Volume / Issue

  • 8 / 4

Start / End Page

  • 361 - 373

PubMed ID

  • 12471945

International Standard Serial Number (ISSN)

  • 1380-7870

Digital Object Identifier (DOI)

  • 10.1023/a:1020518905233


  • eng

Conference Location

  • United States