followup {prodlim} | R Documentation |
Estimation of the median potential followup time.
Description
The reverse Kaplan-Meier method estimates the median potential followup time.
Usage
followup(formula, cens.code = 0, data, ...)
Arguments
formula |
A formula whose left hand side is a |
cens.code |
Value of the event |
data |
A data.frame in which all the variables of
|
... |
Arguments passed to |
Details
This is merely a wrapper for prodlim
with argument reverse.
Value
The estimated median potential followup time with inter quartile ranges.
Author(s)
Thomas A. Gerds <tag@biostat.ku.dk>
References
Michael Schemper and Terry L. Smith. A note on quantifying follow-up in studies of failure time. Controlled Clinical Trials, 17(4):343–346, 1996.
See Also
Examples
set.seed(8)
d <- SimCompRisk(117)
# overall
followup(Hist(time,event)~1,data=d)
# in strata defined by variable X1
followup(Hist(time,event)~X1,data=d)
[Package prodlim version 2025.04.28 Index]