PieceRMaxF: PieceR RCurve constructor function

In gestate: Generalised Survival Trial Assessment Tool Environment

PieceR RCurve constructor function

Description

This creates a RCurve object for a piecewise-linear recruitment distribution with a fixed (maximum) per-patient follow-up time.
RCurve objects contain all necessary information to describe a recruitment distribution. They are a particular type of Curve object containing additional recruitment-related information, including patient numbers and the randomisation ratio.

Usage

PieceRMaxF(recruitment, ratio, maxF)

Arguments

recruitment	2-column matrix with recruitment parameters. First column gives the lengths of each period of recruitment. Second column gives the corresponding rates of recruitment for each period.
ratio	Randomisation ratio; active arm divided by control arm.
maxF	Fixed follow-up time per patient, i.e. maximum time a patient will be at risk independent of length of study.

Details

This RCurve is used when it is expected that patients enter a trial at a rate that varies over time and there is a fixed maximum follow-up time per patient.

Author(s)

James Bell

Examples

rmatrix <- matrix(c(rep(4,3),5,10,15),ncol=2)
rmatrix
PieceRMaxF(recruitment=rmatrix,ratio=1,maxF=12)

gestate documentation built on April 26, 2023, 5:10 p.m.