Fig. 2

Kaplan–Meier analysis of all-cause mortality in the PCI + and PCI−/IHD + groups. After propensity score matching, Kaplan–Meier analysis was performed. The starting point of the survival analysis was the admission date for PCI or IHD. The PCI + group had better long-term prognosis compared to the PCI−/IHD + group. PCI percutaneous coronary intervention, IHD ischaemic heart disease, HR hazard ratio, CI confidence interval