Survival times of 686 patients with primary node positive breast cancer.
bcA data frame with 686 rows.
 censrec  | 
(numeric) | 1=dead, 0=censored | 
 rectime  | 
(numeric) | Time of death or censoring in days | 
 group  | 
(numeric) | 
Prognostic group: "Good","Medium" or "Poor",  | 
| from a regression model developed by Sauerbrei and Royston (1999). | 
Royston, P. and Parmar, M. (2002). Flexible parametric proportional-hazards and proportional-odds models for censored survival data, with application to prognostic modelling and estimation of treatment effects. Statistics in Medicine 21(1):2175-2197.
Sauerbrei, W. and Royston, P. (1999). Building multivariable prognostic and diagnostic models: transformation of the predictors using fractional polynomials. Journal of the Royal Statistical Society, Series A 162:71-94.