[R] Log rank test power calculations

Daniel Brewer daniel.brewer at icr.ac.uk
Thu Jan 31 16:53:23 CET 2008

Does anyone have any ideas how I could do a power calculation for a log
rank test.  I would like to know what the suggested sample sizes would
be to pick a difference when the control to active are in a ratio of 80%
to 20%.



Daniel Brewer, Ph.D.
Institute of Cancer Research
Email: daniel.brewer at icr.ac.uk

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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