censordata {TwoArmSurvSim}

Censor Events Given a Fixed Dropout Rate

Description

Censor events given a fixed dropout rate

Usage

censordata(simdata,lambda,gamma, dropoutrate,ebx=1,gammac=1,groupfreq=1,
censordist='exponential',timeinterval=NULL,HRPW=FALSE)
  

Arguments

simdata

Simulated event dataset

lambda

lambda for event hazard function

gamma

gamma for event hazard function

dropoutrate

Patient dropout rate with range [0,1). If dropoutrate contains only one number. The program will control the dropout rate at population level(treatment + control). If dropoutrate contains two numbers (ie. c(0.2,0.1)), the program will control the dropout rate of control and treatment arm seperately, with the first dropout rate number for control and the second number for treatment. Default value is "0" (no dropout)

ebx

exp(beta*x), if there's no covariates, ebx=1.

groupfreq

frequence of each level of ebx value

timeinterval

time intervals for piecewise baseline hazard function

gammac

gamma for censor hazard function. Default is 1 (exponential)

censordist

censor hazard distribution. Default is exponential

HRPW

Indicator of piecewise hazard ratios. TURE for piecewise. FALSE for non piecewise