addcensoredrows {IrregLong}

Add rows corresponding to censoring times to a longitudinal dataset

Description

Add rows corresponding to censoring times to a longitudinal dataset

Usage

addcensoredrows(data, maxfu, tinvarcols, id, time, event)

Arguments

data

The dataset to which rows are to be added. The data should have one row per observation

maxfu

The maximum follow-up time per subject. If all subjects have the same follow-up time, this can be supplied as a single number. Otherwise, maxfu should be a dataframe with the first column specifying subject identifiers and the second giving the follow-up time for each subject.

tinvarcols

A vector of column numbers corresponding to variables in data that are time-invariant.

id

character string indicating which column of the data identifies subjects

time

character string indicating which column of the data contains the time at which the visit occurred

event

character string indicating which column of the data indicates whether or not a visit occurred. If every row corresponds to a visit, then this column will consist entirely of ones

Value

The original dataset with extra rows corresponding to censoring times

Examples

x <- c(1:3,1:2,1:5)
x0 <- c(rep(2,3),rep(0,2),rep(1,5))
id <- c(rep(1,3),rep(2,2),rep(3,5))
time <- c(0,4,6,2,3,1,3,5,6,7)
event <- c(1,1,1,0,1,0,1,1,1,1)
data <- as.data.frame(cbind(x,id,time,event,x0))
addcensoredrows(data,maxfu=8,id="id",time="time",tinvarcols=5,event="event")


x <- c(1:3,1:2,1:5)
x0 <- c(rep(2,3),rep(0,2),rep(1,5))
id <- c(rep(1,3),rep(2,2),rep(3,5))
time <- c(0,4,6,2,3,1,3,5,6,7)
event <- c(1,1,1,0,1,0,1,1,1,1)
data <- as.data.frame(cbind(x,id,time,event,x0))
maxfu.id <- 1:3
maxfu.time <- c(6,5,8)
maxfu <- cbind(maxfu.id,maxfu.time)
maxfu <- as.data.frame(maxfu)
addcensoredrows(data,maxfu=maxfu,id="id",time="time",tinvarcols=5,event="event")