coxrt {coxrt} | R Documentation |

## A Package to Fit the Cox Regression from Right Truncated Data

### Description

The method assumes that truncation is independent of covariates,
and of lifetime, and that there is no censoring.
The method uses Inverse-Probability-Weighting estimating equations with stabilized weights,
IPW-S and IPW-SA, as described in Vakulenko-Lagun et al. (2018).
Currently the code allows only time-independent covariates.

### Details

The coxrt package provides two functions:
`coxph.RT`

(IPW-S) that assumes positivity
and `coxph.RT.a0`

(IPW-SA) that allows
for adjustment of estimation using plugged-in `a0`

.
The illustrative examples in these functions include analysis of AIDS
latency data with age as a covariate, where the AIDS cases were retrospectively
ascertained at June 30, 1986, and only those who developed AIDS by that time were
included in the analysis (Kalbfeisch and Lawless, 1989).

### References

Vakulenko-Lagun, B., Mandel, M., Betensky, R.A. Inverse probability weighting methods for Cox regression with right-truncated data. 2019, submitted to *Biometrics*

Kalbfeisch, J.D. and Lawless, J.F. Inference based on retrospective ascertainment: an analysis
of the data on transfusion-related AIDS. Journal of the American Statistical Association,
84 (406):360-372, 1989.

[Package

*coxrt* version 1.0.3

Index]