Figure 2. Classification and regression tree analysis. Classification and regression tree (CART) analysis demonstrating the variables which influence the likelihood of repeat PCI for recurrent DES-ISR at 1-year follow-up.

The size of the circles are proportional to the size of the subgroup. The red segments of the circles indicate the percentage of DES-ISR lesions undergoing repeat PCI at 1-year follow-up. DES: drug-eluting stent; LCx: left circumflex coronary artery; ISR: in-stent restenosis; PCI: percutaneous coronary intervention