Fig. 3From: Stereotactic ablative body radiotherapy with a central high dose using CyberKnife for metastatic lung tumorsKaplan–Meier curves. Local control rate according to smoking status (a) and primary site b. Progression-free survival rate according to tumor diameter c. Overall survival rate according to tumor diameter (d) and performance status e. PFS, progression-free survival; PS, performance statusBack to article page