followup: Estimation of the median potential followup time.

In tagteam/prodlim: Product-Limit Estimation for Censored Event History Analysis

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 Hist or a Surv object specifying the event time and the event type where by default 0=censored, 1=event, 2=competing risk (if any). Use cens.code to change the value for censored.
cens.code	Value of the event
data	A data.frame in which all the variables of formula can be interpreted.
...	Arguments passed to prodlim.quantile.

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 <[e-mail]>

See Also

prodlim

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)

tagteam/prodlim documentation built on April 13, 2025, 7:18 a.m.