Assessing Surrogacy with a Censored Outcome R package OSsurvival version 1.0 Identifies the optimal transformation of a surrogate marker and estimates the proportion of treatment explained (PTE) by the optimally-transformed surrogate at an earlier time point when the primary outcome of interest is a censored time-to-event outcome; details are described in Wang et al (2021) <doi:10.1002/sim.9185>. Software Depends: R (>= 2.10) Suggests: testthat, stats Layla Parast <parast@austin.utexas.edu> Comprehensive R Archive Network (CRAN) Xuan Wang [aut], Clara-Lea Bonzel [aut], Tianxi Cai [aut], Layla Parast [aut, cre], PARSE LTD [aut] GPL-3 2022-09-29 application/tgz https://CRAN.R-project.org/package=OSsurvival doi:10.32614/CRAN.package.OSsurvival