leuk2 {bpcp}

Acute Leukemia data from Freireich et al (1963).

Description

In this study there were 21 pairs of subjects, and within each pair one subject received 6-mercaptopurine (6-MP) and one got placebo. The data are right censored.

See also Gehan (1965) who used the data ignoring the pairing so that he could illustrate his famous two-sample (non-paired) rank test.

Usage

data(leuk2)

Format

A data frame with 42 observations on the following variables.

time

time in remission (in weeks)

status

event status, 1 is relapse, 0 is censored

treatment

treatment group: either 'placebo' or '6-MP'

pair

pair id number

References

Gehan (1965) Biometrika 52:203-223.

Freireich et al (1963) Blood 21(6):699-716.

See Also

leuk is only the treated group

Examples

data(leuk2)