Provides functions for the evaluation of
    surrogate endpoints when both the surrogate and the true endpoint are failure
    time variables. The approaches implemented are:
    (1) the two-step approach (Burzykowski et al, 2001) <doi:10.1111/1467-9876.00244> with a copula model (Clayton, Plackett, Hougaard) at
    the first step and either a linear regression of log-hazard ratios at the second
    step (either adjusted or not for measurement error);
    (2) mixed proportional hazard models estimated via mixed Poisson GLM
    (Rotolo et al, 2017 <doi:10.1177/0962280217718582>).
| Version: | 1.1.27 | 
| Depends: | R (≥ 3.5.0) | 
| Imports: | copula, eha, grDevices, lme4, MASS, Matrix, msm, mvmeta, optimx, parallel, parfm, stats, survival | 
| Suggests: | R.rsp, testthat (≥ 3.0.0) | 
| Published: | 2025-10-10 | 
| DOI: | 10.32614/CRAN.package.surrosurv | 
| Author: | Federico Rotolo  [aut],
  Xavier Paoletti [ctb],
  Marc Buyse [ctb],
  Tomasz Burzykowski [ctb],
  Stefan Michiels  [ctb],
  Dan Chaltiel  [cre] | 
| Maintainer: | Dan Chaltiel  <dan.chaltiel at gustaveroussy.fr> | 
| BugReports: | https://github.com/Oncostat/surrosurv/issues/ | 
| License: | GPL-2 | 
| URL: | https://github.com/Oncostat/surrosurv | 
| NeedsCompilation: | no | 
| Materials: | README, NEWS | 
| CRAN checks: | surrosurv results |