coxrt - Cox Regression for Right Truncated Data

The coxrt package fits Cox regression based on retrospectively ascertained time-to-event data. The method uses Inverse-Probability-Weighting (IPW) estimating equations with stabilized weights as described in Vakulenko-Lagun, Mandel, and Betensky, Inverse-Probability-Weighting Methods for Cox Regression with Right Truncated Data (under revision for Biometrics, 2019).

The coxrt package provides two functions: coxph.RT that assumes positivity and coxph.RT.a0 that allows for adjustment of estimation under violation of positivity.

The coxrt package can be installed by


The examples of when and how to use coxrt package are here.