gbsg data set contains patient records from a 1984-1989 trial
conducted by the German Breast Cancer Study Group (GBSG) of 720 patients
with node positive breast cancer; it retains the 686 patients with
complete data for the prognostic variables.
A data set with 686 observations and 11 variables.
menopausal status (0= premenopausal, 1= postmenopausal)
tumor size, mm
number of positive lymph nodes
progesterone receptors (fmol/l)
estrogen receptors (fmol/l)
hormonal therapy, 0= no, 1= yes
recurrence free survival time; days to first of reccurence, death or last follow-up
0= alive without recurrence, 1= recurrence or death
These data sets are used in the paper by Royston and Altman. The Rotterdam data is used to create a fitted model, and the GBSG data for validation of the model. The paper gives references for the data source.
Patrick Royston and Douglas Altman, External validation of a Cox prognostic model: principles and methods. BMC Medical Research Methodology 2013, 13:33
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