Table 4

Discrimination of each predicting model for cardiac events

Discrimination
Risk factors and imaging findingsC index (95% CI)p ValueNRIp ValueIDIp Value
Clinical risk factors†0.768 (0.655 to 0.880)ReferenceReferenceReference
Clinical risk factors† plus UCT0.811 (0.718 to 0.905)0.10490.7070.0003*0.03690.0235
Clinical risk factors† plus SSS0.807 (0.701 to 0.912)0.11560.7310.0002*0.04210.0005
Clinical risk factors† plus UCT and SSS0.834 (0.742 to 0.927)0.0454*0.6490.0008*0.07010.0006
Clinical risk factors† plus UCTReferenceReferenceReference
Clinical risk factors† plus UCT and SSS0.19890.7070.0003*0.02810.039
Clinical risk factors† plus SSSReferenceReferenceReference
Clinical risk factors† plus UCT and SSS0.14860.6450.0009*0.03330.0009
  • *p Value<0.05.

  • †Clinical risk factors comprise LVEF, time since CABG, and EuroSCORE II.

  • CABG, coronary-artery-bypass grafting; EuroSCORE II, European System for Cardiac Operative Risk Evaluation risk model; IDI, integrated discrimination improvement; LVEF, left ventricular ejection fraction; NRI, net reclassification improvement; SSS, summed stress score; UCT, unprotected coronary territory.