LDTdata {DTR} | R Documentation |

##
LDT data set

### Description

This data set was generates from sequentially randomized clinical trials as described in the simulation study of Lunceford, Davidian and Tsiatis (2002). It contains the following variables: "X" is the first-stage indicator, X=0 if assigned to A1, and X=1 if assigned to A2; "R" is the response status, R=1 for responders, and R=0 for non-responders; "Z" is the second-stage indicator among responders (R=1), Z=0 if assigned to B1, and Z=1 if assigned to B2; "U" is the observed survival time, U is death time if delta=1, and U is censoring time if delta=0; "delta" is the censoring indicator, delta=1 for event, and delta=0 for censored.

### Usage

```
LDTData
```

### Format

A data frame with rows corresponding to patients.

### Source

Generated by Xinyu Tang in R

### References

Lunceford JK, Davidian M, Tsiatis AA: Estimation of survival distributions of treatment policies in two-stage randomization designs in clinical trials. Biometrics 58:48-57, 2002

### Examples

```
## Not run:
data("LDTdata")
## End(Not run)
```

[Package

*DTR* version 1.7

Index]