Sample-size formula for the proportional-hazards regression model.

Volume: 39, Issue: 2, Pages: 499 - 503
Published: Jun 1, 1983
Abstract
A formula is derived for determining the number of observations necessary to test the equality of two survival distributions when concomitant information is incorporated. This formula should be useful in designing clinical trials with a heterogeneous patient population. Schoenfeld (1981, Biometrika 68, 316-319) derived the asymptotic power of a class of statistics used to test the equality of two survival distributions. That result is extended...
Paper Details
Title
Sample-size formula for the proportional-hazards regression model.
Published Date
Jun 1, 1983
Journal
Volume
39
Issue
2
Pages
499 - 503
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