Re: [R] Cox's regression analysis with Left truncated data

Surv(entry-time, last-follow-up-time, status-at-last-follow-up) This works in survfit, coxph, and coxme. Left truncation is currently not implemented for survreg. In your case both times above would be "time since event". Terry T. --- begin included message -- I have a fairly simple que

[R] Cox's regression analysis with Left truncated data

Hi, I have a fairly simple question. I would like to use the survival package to perform an analysis on data where an event can have occurred before individuals were recruited into a study. I'm not sure how to do this using the Surv() function. I would have a date of an event and then the enrol