Stepped Wedge Cluster Randomized Trial (SW CRT) Design R package swCRTdesign version 4.1 A set of tools for examining the design and analysis aspects of stepped wedge cluster randomized trials (SW CRT) based on a repeated cross-sectional or cohort sampling scheme (Hussey MA and Hughes JP (2007) Contemporary Clinical Trials 28:182-191). Software Imports: stats, lme4, lmerTest, glmmTMB Jim Hughes <jphughes@uw.edu> Comprehensive R Archive Network (CRAN) Jim Hughes [aut, cre], Navneet R. Hakhu [aut], Emily Voldal [aut], Fan Xia [aut] GPL-2 2025-09-04 application/tgz https://CRAN.R-project.org/package=swCRTdesign doi:10.32614/CRAN.package.swCRTdesign