leuk {boot}R Documentation

Survival Times and White Blood Counts for Leukaemia Patients

Arguments

wbc White blood cell count.
ag Factor describing the patients group according to the test described above. Levels are present and absent.
time Survival time in weeks after diagnosis.

SUMMARY

The leuk data frame has 33 rows and 3 columns.

Survival times are given for 33 patients who died from acute myelogenous leukaemia. Also measured was the patient's white blood cell count at the time of diagnosis. The patients were also factored into 2 groups according to the presence or absence of a morphologic characteristic of white blood cells. Patients termed AG positive were identified by the presence of Auer rods and/or significant granulation of the leukaemic cells in the bone marrow at the time of diagnosis.

DATA DESCRIPTION

This data frame contains the following columns:

SOURCE

The data were obtained from

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

OTHER REFERENCES

Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.

Venables, W.N. and Ripley, B.D. (1994) Modern Applied Statistics with S-Plus. Springer-Verlag.


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