Treatment Switching R package trtswitch version 0.2.7 Implements rank preserving structural failure time model (RPSFTM), iterative parameter estimation (IPE), inverse probability of censoring weights (IPCW), marginal structural model (MSM), simple two-stage estimation (TSEsimp), and improved two-stage estimation with g-estimation (TSEgest) methods for treatment switching in randomized clinical trials. Software Depends: R (>= 3.5) Imports: Rcpp (>= 1.0.9), RcppParallel (>= 5.1.5), parallel (>= 3.5), rlang (>= 1.0.6), data.table (>= 1.14.10), ggplot2 (>= 3.3.6), cowplot (>= 1.2.0) LinkingTo: Rcpp, RcppParallel, RcppThread, BH Suggests: testthat (>= 3.0.0), dplyr (>= 1.1.4), tidyr (>= 1.3.1), survival (>= 3.5-7), knitr (>= 1.45), rmarkdown (>= 2.25), pkgdown (>= 2.2.0) Kaifeng Lu <kaifenglu@gmail.com> Comprehensive R Archive Network (CRAN) Kaifeng Lu [aut, cre] (ORCID: <https://orcid.org/0000-0002-6160-7119>) GPL (>= 2) 2026-06-25 application/tgz https://CRAN.R-project.org/package=trtswitch doi:10.32614/CRAN.package.trtswitch