Survival Analysis R package survival version 3.8-9 CRAN Task View: ClinicalTrials (https://CRAN.R-project.org/view=ClinicalTrials) CRAN Task View: Econometrics (https://CRAN.R-project.org/view=Econometrics) CRAN Task View: Survival (https://CRAN.R-project.org/view=Survival) Contains the core survival analysis routines, including definition of Surv objects, Kaplan-Meier and Aalen-Johansen (multi-state) curves, Cox models, and parametric accelerated failure time models. Software Depends: R (>= 4.1.0) Imports: graphics, Matrix, methods, splines, stats, utils Terry M Therneau <terry.therneau@proton.me> Comprehensive R Archive Network (CRAN) Terry M Therneau [aut, cre], Thomas Lumley [ctb, trl] (original S->R port and R maintainer until 2009), Atkinson Elizabeth [ctb], Crowson Cynthia [ctb] LGPL (>= 2) 2026-07-08 application/tgz https://CRAN.R-project.org/package=survival doi:10.32614/CRAN.package.survival