TwoSSPtrunc: Create an ROC curve for left truncated right censored data.

In SandraCastroPearson/2SPcurves: A Package for the Analysis of Time to Event Outcomes Using Two-Sample Probability Curves

Create an ROC curve for left truncated right censored data.

Description

This function creates ROC curve for survival data from clinical trials and calculates the area under the curve.

Usage

TwoSSPtrunc(
  entry,
  exit,
  event,
  group,
  area = FALSE,
  silent = FALSE,
  CI = FALSE,
  level = 0.95,
  B = 1000,
  xlab = NULL,
  ylab = NULL,
  main = NULL,
  cex.axis = 1.5,
  cex.lab = 1.5,
  legend.inset = 0.02,
  legend.cex = 1.5,
  lty = c(2, 1, 3),
  lwd = 1.5
)

Arguments

entry	The entry time for the participant that determined left truncation.
exit	Time when the event or censoring occurred (must be higher than entry time).
event	An indicator vector with values of 1 for individuals who had the event occur or 0 if the participant was censored.
group	An indicator vector with values of 1 if the the participant was in the treatment or exposed group and 0 otherwise.
area	Logical argument to indicate if user wants an estimate for area under the curve (default is TRUE).
silent	Logical argument, FALSE indicates the user wants ROC plots and TRUE indicates no plots only AUC calculations (default is FALSE).
CI	Logical argument indicating if user wants bootstrap errors and confidence intervals to be calculated for the curve and AUC. Default is FALSE.
level	Numerical argument indicating condifence level for the confidence interval. Default is 0.95. It's ignored if CI=FALSE.
B	Number of bootstrap samples to use for confidence interval and error calculations. Default is 1000. It's ignored if CI=FALSE.
xlab	String argument for the horizontal axis label of the curve.
ylab	String argument for the vertical axis label of the curve.
main	String argument for the title of the curve.
cex.axis	Optional graphical parameter for magnification of axis annotation. See par for more details.
cex.lab	Optional graphical parameter for magnification of x and y labels. See par for more details.
legend.inset	Optional graphical parameter controling legend inset.
legend.cex	Optional graphical parameter for magnification of a legend's text.
lty	Optional graphical parameter to set the type of lines to use. Can be a number or a vector. See par for more details.
lwd	Optional graphical parameter for line width relative to the default. See par for more details.

Value

A plot of the ROC curve and an ROCsurv object containing:

• Data frame with the estimated survival curves.

• icsurv object from application of EM to the control group data.

• icsurv object from application of EM to the treated group data.

SandraCastroPearson/2SPcurves documentation built on June 15, 2022, 3:42 a.m.