Fig. 3
Kaplan–Meier analysis of the survival of patients. A The Kaplan–Meier curve of 64 patients in the derivation cohort. B The 64 patients in the derivation cohort were separated into two groups according to the baseline CTFLV/TLV%, with a cutoff of 11%. The two curves separate obviously at the beginning of the follow-up and become farther with the increase in follow-up months. C The Kaplan–Meier curve of 31patients in the validation cohort. D Patients in the validation cohort were divided into two groups by the cutoff point of 11% for baseline CTFLV/TLV%. The two survival curves separated apart significantly even at the beginning of the observation. No patient of the CT FLV/TLV% < 11% group died in the first 5 years. The graph only shows the survival in the first 5 years from the date of enrollment of every individual patient in our study