Re: [R] log-rank test

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From: Frank E Harrell Jr (fharrell@virginia.edu)
Date: Tue 14 Jan 2003 - 13:45:48 EST


Message-id: <20030113214548.1ca4b45d.fharrell@virginia.edu>

On Mon, 13 Jan 2003 12:06:55 -0800
Ngayee J Law <Ngayee.Law@celeradiagnostics.com> wrote:

> Hello all,
>
> Is there a function to do log-rank test in R? Thanks!
>
> - Jacqueline
>

It's a special case of the Cox model (see coxph in the survival package). If you want the standard logrank test, see the logrank function in the Hmisc package (it does not handle stratification though). E.g.

library(Hmisc)
logrank(Surv(d.time,death), treatment) # assumes treatment coded 1,2

See http://hesweb1.med.virginia.edu/biostat/s/Hmisc.html

-- 
Frank E Harrell Jr              Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine  http://hesweb1.med.virginia.edu/biostat

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