Is it possible to calculate Kaplan-Meier for left-truncated, right-censored data using survival5? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Thomas Lumley
2001-Mar-11 22:23 UTC
[R] Kaplan-Meier for left-truncated, right-censored data
On Sun, 11 Mar 2001, Chong Gu wrote:> > Is it possible to calculate Kaplan-Meier for left-truncated, > right-censored data using survival5?Yes and no. You can calculate the baseline survival curve for a null Cox model, which comes to the same thing Eg, using the test2 dataset from help(coxph) survfit(coxph(Surv(start,stop,event)~1,data=test2),type="kaplan-meier") Using type="kaplan-meier" gives a product-type estimator that in untruncated data would be the Kaplan-Meier. Without this you get exp(-H) where H is the estimated cumulative hazard (an estimator variously attributed to Aalen, Breslow, Peto, and probably others). -thomas -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Strumila, John
2001-Mar-12 22:50 UTC
[R] Kaplan-Meier for left-truncated, right-censored data
well I had a chuckle. amazon has categorised Miller's "Survival Analysis" as "religion and spirituality"; but then again, maybe they're right. John Strumila http://www.amazon.com/exec/obidos/ASIN/0471255483/o/qid=984436977/sr=8-1/ref =aps_sr_b_1_1/104-4404017-0142332 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._