leukemiaFZ: Survival Times of Patients with Leukemia (Feigl and Zelen)

In BGPhazard: Markov Beta and Gamma Processes for Modeling Hazard Rates

Survival Times of Patients with Leukemia (Feigl and Zelen)

Description

Survival times of 33 patients with leukemia (Feigl and Zeelen, 1965). Times are measured in weeks from diagnosis. Reported covariates are white blood cell counts (WBC) and a binary variable AG that indicates a positive or negative test related to the white blood cell characteristics. Three of the observations were censored. The data was taken from Lawless (2003).

Usage

data(leukemiaFZ)

Format

A data frame with 33 observations on the following 4 variables.

time

Weeks from diagnosis.

delta

Status indicator: 0=censored.

AG

Indicates a positive or negative test related to the white blood cell characteristics. (1=AG-positive, 2=AG-negative).

wbc

White blood cell counts in thousands (reported covariates).

Source

Lawless, J.F. (2003). Statistical Models and Methods for Lifetime Data. Wiley: New Jersey.

References

Feigl, P. and Zelen, M. (1965). Estimation of Exponential Survival Probabilities with Concomitant Information. Biometrics 21, 826-838.

Examples

## Cox-Gamma Process Example 1
#  data(leukemiaFZ)
#  leukemia1 <- leukemiaFZ
#  leukemia1$wbc <- log(leukemiaFZ$wbc)
#  CGEX1 <- CGaMRes(data = leukemia1, K = 10, iterations = 100, thinning = 1)

BGPhazard documentation built on Sept. 3, 2023, 5:09 p.m.