Re: [R] Plotting an adjusted survival curve

2012-11-27 Thread Brent Caldwell
Dear Terry and David Thank you so much for your rapid and helpful replies! I've changed tack slightly and decided to focus on the effect modifiers which had the greatest effect on the outcome of the trial (HowmanyZonnic_Q and WISDMPDM) I've tried to follow your example on page 16 of the manuscrip

Re: [R] Plotting an adjusted survival curve

2012-11-26 Thread Terry Therneau
First a statistical issue: The survfit routine will produce predicted survival curves for any requested combination of the covariates in the original model. This is not the same thing as an "adjusted" survival curve. Confusion on this is prevalent, however. True adjustment requires a populati