Table 5.

Incremental prognostic value of PVCs over modified mayo stages

	C index	P value	IDI (95%CI)	P value	Overall NRI(95%CI)	P value
Modified Mayo stage	0.681	Ref	Ref		Ref
PVC counts tertile + modified Mayo stage	0.712	0.046	0.134 (0.027–0.240)	0.016	0.720 (0.121–1.105)	0.026
PVC burden tertile + modified Mayo stage	0.717	0.022	0.140 (0.034–0.245)	0.018	0.701 (0.088–1.051)	0.026

CI, confidence interval; C-index, Harrell’s C concordance index; IDI, integrated discrimination improvement; NRI, net reclassification index.