simulate_linear {survcompare}

Simulated sample with survival outcomes with linear dependencies

Description

Simulated sample with exponentially or Weibull distributed time-to-event; log-hazard (lambda parameter) depends linearly on risk factors.

Usage

simulate_linear(
  N = 300,
  observe_time = 10,
  percentcensored = 0.75,
  randomseed = NULL,
  lambda = 0.1,
  distr = "Exp",
  rho_w = 1,
  drop_out = 0.3
)

Arguments

N

sample size, 300 by default

observe_time

study's observation time, 10 by default

percentcensored

expected number of non-events by observe_time, 0.75 by default (i.e. event rate is 0.25)

randomseed

random seed for replication

lambda

baseline hazard rate, 0.1 by default

distr

time-to-event distribution, "Exp" for exponential (default), "W" for Weibull

rho_w

shape parameter for Weibull distribution, 0.3 by default

drop_out

expected rate of drop out before observe_time, 0.3 by default

Value

data frame; "time" and "event" columns describe survival outcome; predictors are "age", "sex", "hyp", "bmi"

Examples

mydata <- simulate_linear()
head(mydata)