Semiparametric interval censored survival regression with stratification
# Install 'icsp2' from R-universe:
install.packages('icsp2', repos = c('https://igrave.r-universe.dev', 'https://cloud.r-project.org'))This is a cut down package to calculate Cox models for interval censored data and perform a log-rank type test. It is especially designed to mirror the typical clinical trial survival analysis methods that would be done for right censored data. Therefore it could be used as a sensitivity analysis in the presence of interval censoring.
This package borrows heavily from icenReg, specifically the ic_sp() implementation. The main change is the addition of support for stratified baseline hazards and analytical derivatives. We also implement a profile likelihood variance estimation procedure for the regression coefficients.
The logrank test is our own and aims to replace a PROC ICLIFETEST test using Sun type weights and imputed variance.