Fig. 1: PFS and OS based on the updated R-ISS.
From: A simple additive staging system for newly diagnosed multiple myeloma
a PFS (months) and b OS (years) in MM patients with stage I (red curve), II (green), and III (blue curve) based on the updated R-ISS. MM multiple myeloma, OS overall survival, PFS progression-free survival, R-ISS revised international staging system. The P values for each pair of groups are presented between the corresponding curves.
