[R] Survfit,newdata and continuous time varying covariates

From: Hanke, Alex <HankeA_at_mar.dfo-mpo.gc.ca>
Date: Wed 15 Jun 2005 - 04:38:34 EST

Hi All,
I am working with three time varying covariates in a coxph model. I cannot seem to figure out how to use survfit and the newdata argument to provide estimated survival curves for two scenarios of one covariate while holding the other two at the mean value.
Is it possible to display how estimated survival depends on alternative scenarios/profiles of a time varying covariate?

Alex Hanke
Department of Fisheries and Oceans
St. Andrews Biological Station
531 Brandy Cove Road
St. Andrews, NB
E5B 2L9

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