YPmodel-package {YPmodel}

The short-term and long-term hazard ratio model for survival data

Description

This package has four major functions related to the short-term and long-term hazard ratio model (Yang and Prentice, 2005): 1) YPmodel.estimate es timates short-term and long-term hazard ratio parameters and their confidence intervals, and the odds function of the control group; 2) YPmodel.IntervalBands provides 95% pointwise confidence intervals and 95% and 90% simultaneous confidence bands for the hazard ratio function; 3) YPmodel.adlgrk estimates p-value of the adaptive weighted log-rank test, to test for treatment effects with time to event data; 4) YPmodel.lackfittest estimates p-values of two lack-of-fit tests for the model, to test for checking this semi-parametric model. See the included "read_me_first.pdf" for brief instructions.

Details

Package:	YPmodel
Type:	Package
Version:	1.2
Date:	2015-09-20
License:	GPL (>= 3)

Author(s)

Junlong Sun and Song Yang

References

1) YANG, S. AND PRENTICE, R. L. (2011). Estimation of the 2-sample hazard ratio function using a semiparametric model. Biostatistics 12, 354-368. 2) YANG, S. AND PRENTICE, R. L. (2010). Improved Logrank-Type Tests for Survival Data Using Adaptive Weights. Biometrics 66, 30-38. 3) YANG, S. AND PRENTICE, R. L. (2005). Semiparametric analysis of short-term and long-term hazard ratios with two-sample survival data. Biometrika 92, 1-17. 4) YANG, S. AND ZHAO, Y. (2012). Checking the Short-Term and Long-Term Hazard Ratio Model for Survival Data. Scandinavian Journal of Statistics. 5) GASTROINTESTINAL TUMOR STUDY GROUP (1982). A comparison of combination chemotherapy and combined modality therapy for locally advanced gastric carcinoma. Cancer.

See Also

YPmodel

Examples

	library(YPmodel)
	data(gastric)
	YPmodel(gastric, repNum=100)
	browseVignettes(package="YPmodel")