# Generalized logrank tests for interval-censored failure time data

### Description

Functions to conduct four nonparametric generalized logrank tests and a score test under a proportional hazards model

### Details

Package: | glrt |

Type: | Package |

Version: | 2.0 |

Date: | 2014-12-24 |

License: | GPL-2 |

LazyLoad: | yes |

The main function is `gLRT`

, in which a method is selected. Depending on the method specified, one of the five functions (`gLRT1`

, `gLRT2`

, `gLRT3`

, `gLRT4`

, `ScoreTest`

) is called to perform a generalized logrank test or a scor test. Before computing the test statistic in each test, function `ModifiedEMICM`

is called to compute an NPMLE of the common survival function under the null hypothesis that all treatments have the same survival function except for in `gLRT4`

, where `ModifiedEMICM`

is used to estimate the survival function of each treatment group.

### Author(s)

Qiang Zhao and Jianguo Sun

Maintainer: Qiang Zhao <qiang.zhao@txstate.edu>

### References

Q. Zhao and J. Sun (2004), "Generalized Log-rank Test for Mixed-Censored Failure Time Data", Statistics in Medicine, 23: 1621-1629.

J. Sun, Q. Zhao, and X. Zhao (2005), "Generalized Log-rank Test for Interval-Censored Data", Scandinavian Journal of Statistics, 32: 45-57.

X. Zhao, Q. Zhao, J. Sun, Q. and J. S. Kim (2008), "Generalized Log-rank Tests for Partly Interval-Censored Failure Time Data", Biometrical Journal, 50 (3): 375-385.

X. Zhao, R. Duan, Q. Zhao, and J. Sun (2013), "A New Class of Generalized Log Rank Tests for Interval-censored Failure Time Data", Computational Statistics and Data Analysis. 60: 123-131.

Finkelstein, DM (1986), "A Proportional Hazards Model for Interval-censored Failure Time Data", Biometrics, 42: 845-854.

Q. Zhao (2012), "gLRT - A New R Package for Analyzing Interval-censored Survival Data", Interval-Censored Time-to-Event Data: Methods and Applications, CRC Press, 377-396.

### See Also

`gLRT`

, `gLRT1`

, `gLRT2`

, `gLRT3`

, `gLRT4`

, `ScoreTest`

, `ModifiedEMICM`