Initial and follow-up status for 37 breast cancer patients treated for
spinal metastases. The status is able to walk unaided (1), unable to
walk unaided (2), dead (3). The follow-up times are 0, 3, 6, 12, 24,
and 60 months after treatment began.
Usage
data(breast)
Arguments
Format
A data frame with 37 observations on the following 8 variables.
j
Case number
init
Initial status
x0
Status immediately after treatment started
x1
Status after 3 months
x2
Status after 6 months
x3
Status after 12 months
x4
Status after 24 months
x5
Status after 60 months
Details
Woman 24 was alive after 6 months
but her ability to walk was not recorded (she was in state 1 or 2).
NA indicates that a woman has previously died, or that her status is
unknown.
References
Davison, A. C. (2003) Statistical Models. Cambridge University Press.
Page 227.