Sample Size Calculation under Non-Proportional Hazards
person(given = "Huan",
family = "Cheng",
role = c("aut", "cre"),
email = "hcheng1118@hotmail.com",
comment = c(ORCID = "0000-0002-2552-7656"))
Performs combination tests and sample size calculation for
fixed design with survival endpoints using combination tests under either
proportional hazards or non-proportional hazards. The combination tests
include maximum weighted log-rank test and projection test. The sample
size calculation procedure is very flexible, allowing for user-defined
hazard ratio function and considering various trial conditions like
staggered entry, drop-out etc. Trial simulation function is also provided
to facilitate the empirical power calculation. The references for
projection test and maximum weighted logrank test include Brendel et al. (2014)
<doi:10.1111/sjos.12059> and Cheng and He (2021) <arXiv:2110.03833>. The
references for sample size calculation under proportional hazard include
Schoenfeld (1981) <doi:10.1093/biomet/68.1.316> and Freedman (1982) <doi:10.1002/sim.4780010204>.
The references for calculation under non-proportional hazards include
Lakatos (1988) <doi:10.2307/2531910> and Cheng and He (2021) (under review).

Non-Proportional Hazards in Randomized Controlled Trials
c(person("Dominic", "Magirr", email = "d.magirr@gmail.com", role = c("aut", "cre")),
person("Isobel", "Barrott", email = "isobel.barrott@gmail.com", role = c("aut")),
person("Jose", "Jimenez",  role = c("ctb")))
Perform a stratified weighted log-rank test in a randomized controlled trial. Tests can be visualized as a difference in average score on the two treatment arms. These methods are described in Magirr and Burman (2018) <arXiv:1807.11097v1>, Magirr (2020) <arXiv:2007.04767v1>, and Magirr and Jimenez (2022) <arXiv:2201.10445v1>.
knitr, rmarkdown, testthat (>= 3.0.0), dplyr, cowplot,
survminer
Dominic Magirr [aut, cre],
Isobel Barrott [aut],
Jose Jimenez [ctb]

Access the U.S. National Provider Identifier Registry API
c(
person("Frank", "Farach", , "frank.farach@gmail.com",
role = c("cre", "aut", "cph"),
comment = c(ORCID = "0000-0002-2145-0145")),
person("Sam", "Parmar", , "parmartsam@gmail.com", role = "ctb"),
person("Matthias", "Grenié", , "matthias.grenie@idiv.de", role = "rev",
comment = c(ORCID = "0000-0002-4659-7522")),
person(c("Emily", "C."), "Zabor", , "zabore2@ccf.org", role = "rev",
comment = c(ORCID = "0000-0002-1402-4498"))
)
Access the United States National Provider Identifier
Registry API <https://npiregistry.cms.hhs.gov/api/>. Obtain and transform
administrative data linked to a specific individual or organizational
healthcare provider, or perform advanced searches based on provider name,
location, type of service, credentials, and other attributes exposed by
the API.
checkLuhn, checkmate, curl, dplyr, glue, httr, magrittr,
purrr, rlang, stringr, tibble, tidyr, utils
covr, httptest, knitr, mockery, rmarkdown, spelling, testthat
(>= 2.1.0)
Frank Farach [cre, aut, cph] (<https://orcid.org/0000-0002-2145-0145>),
Sam Parmar [ctb],
Matthias Grenié [rev] (<https://orcid.org/0000-0002-4659-7522>),
Emily C. Zabor [rev] (<https://orcid.org/0000-0002-1402-4498>)