swMATH ID: 40189
Software Authors: Junlong Sun; Song Yang
Description: R package YPmodel: The Short-Term and Long-Term Hazard Ratio Model for Survival Data. Inference procedures accommodate a flexible range of hazard ratio patterns with a two-sample semi-parametric model. This model contains the proportional hazards model and the proportional odds model as sub-models, and accommodates non-proportional hazards situations to the extreme of having crossing hazards and crossing survivor functions. Overall, this package has four major functions: 1) the parameter estimation, namely short-term and long-term hazard ratio parameters; 2) 95 percent and 90 percent point-wise confidence intervals and simultaneous confidence bands for the hazard ratio function; 3) p-value of the adaptive weighted log-rank test; 4) p-values of two lack-of-fit tests for the model. See the included ”read_me_first.pdf” for brief instructions. In this version (1.1), there is no need to sort the data before applying this package.
Homepage: https://cran.r-project.org/web/packages/YPmodel/index.html
Source Code: https://github.com/cran/YPmodel
Dependencies: R
Keywords: arXiv_stat.ME; Yang and Prentice; YP model; piecewise exponential; PE distribution; crossing survival curves; survival data; PH PO AFT models
Related Software: YPPE; R; SAS
Cited in: 1 Publication

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1 Publication describing the Software Year
A fully likelihood-based approach to model survival data with crossing survival curves
Fabio N. Demarqui, Vinicius D. Mayrink

Cited in 1 Serial

1 Biometrika

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