Datasets for Statistical Analysis

Leukaemia survival times

Keywords:

survival, leukaemia

Categories:

generalized linear models
health

Description:

The data gives the times to death (in weeks) and white blood cell counts for two groups of leukaemia patients, AG-positive and AG-negative. The two groups have not been created by random allocation.

There are 33 observations on three variables.

Variables:

WBC	The white blood cell count
Time	The time to death (in weeks)
AG	AG is 1 for AG-positive patients, and is 2 for AG-negative patients.

Data Quality:

There are no missing values.

Source:

Feigl, P and Zelen, M. (1965). Estimation of exponential survival probabilities with concomitant information in Biometrics, 21, 826--838.

The data also appear in Hand et al, dataset 424.

Notes:

A small, simple example of a gamma glm. The original source (pre-glms days) uses an exponential distribution with identity link, though an inverse link appears more sensible.

References: