Patient ID number
Year of surgery
Relapse free interval [mo]
Relapse indicator
Metastasis free [m]
Metastasis status
Overall survival (m)
Overall survival
age at surgery
pre/post meno
Tumour size, 3 classes (t)
Differentiation grade (diff)
Number of positive nodes (nrpos)
PgR (fmol/l)
ER (fmol/l)
Hormonal therapy
Chemo therapy
exp(-0.12 * nodes)
log(pr + 1)
enodes^2
year of surgery, dichotomized