KMsurv (version 0.1-5)

lifetab: Create cohort life table

Description

Create cohort life table.

Usage

lifetab(tis, ninit, nlost, nevent)

Arguments

tis

a vector of end points of time intervals, whose length is 1 greater than nlost and nevent.

ninit

the number of subjects initially entering the study.

nlost

a vector of the number of individuals lost follow or withdrawn alive for whatever reason.

nevent

a vector of the number of individuals who experienced the event

Value

A data.frame with the following columns:

nsubs

the number of subject entering the intervals who have not experienced the event.

nlost

the number of individuals lost follow or withdrawn alive for whatever reason.

nrisk

the estimated number of individuals at risk of experiencing the event.

nevent

the number of individuals who experienced the event.

surv

the estimated survival function at the start of the intervals.

pdf

the estimated probability density function at the midpoint of the intervals.

hazard

the estimated hazard rate at the midpoint of the intervals.

se.surv

the estimated standard deviation of survival at the beginning of the intervals.

se.pdf

the estimated standard deviation of the prbability density function at the midpoint of the intervals.

se.hazard

the estimated standard deviation of the hazard function at the midpoint of the intervals

The row.names are the intervals.

Examples

tis <- c(0, 2, 3, 5, 7, 11, 17, 25, 37, 53, NA)
nsubs <- c(927, 848, 774, 649, 565, 449, 296, 186, 112, 27)
nlost <- c(2, 3, 6, 9, 7, 5, 3, rep(0, 3))
nevent <- c(77, 71, 119, 75, 109, 148, 107, 74, 85, 27)

lifetab(tis, nsubs[1], nlost, nevent)