Heart Transplant Data

Description

The Stanford University Heart Transplant Study was conducted to determine whether an experimental heart transplant program increased lifespan. Each patient entering the program was designated officially a heart transplant candidate, meaning that he was gravely ill and would most likely benefit from a new heart. Then the actual heart transplant occurs between a few weeks to several months depending on the availability of a donor. Very few candidates during this waiting period show improvement and get deselected as a heart transplant candidate, but for the purposes of this experiment those patients were kept in the data as continuing candidates.

Usage

heart_transplant

Format

A data frame with 103 observations on the following 8 variables.

id: ID number of the patient.
acceptyear: Year of acceptance as a heart transplant candidate.
age: Age of the patient at the beginning of the study.
survived: Survival status with levels alive and dead.
survtime: Number of days patients were alive after the date they were determined to be a candidate for a heart transplant until the termination date of the study
prior: Whether or not the patient had prior surgery with levels yes and no.
transplant: Transplant status with levels control (did not receive a transplant) and treatment (received a transplant).
wait: Waiting Time for Transplant

Source

http://www.stat.ucla.edu/~jsanchez/data/stanford.txt

References

Turnbull B, Brown B, and Hu M (1974). "Survivorship of heart transplant data." Journal of the American Statistical Association, vol. 69, pp. 74-80.

Statistics

Mathematics