| breast {SMPracticals} | R Documentation |
Breast Cancer Data
Description
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)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.
Source
de Stavola, B. L. (1988) Testing departures from time homogeneity in multistate Markov processes. Applied Statistics, 37, 242–250.
References
Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 227.
Examples
data(breast)