Figure 6

Hazard rate estimates for mortality in 1615 ERP tumours and 427 ERN tumours from patients undergoing conservative surgery (quadrantectomy or tumourectomy) plus RT. The mortality risk patterns reveal differences between ERP and ERN tumours in the clinical course of the disease during the critical period spanning from clinical recurrence to death. Vertical lines represent point-wise confidence interval for the model estimated hazards, according to standard asymptotic theory.