Table 5.

Area under ROC curve in different combinations of risk factors

Combined factors	AUC	95% CI
HRV (SDNN) & VLP-fQRSd	0.73	0.59-0.87
HRV (SDNN) & LVEF (follow-up)	0.73	0.60-0.87
VLP-fQRSd & LVEF (follow-up)	0.73	0.59-0.87
HRV (SDNN) & VLP-fQRSd & LVEF (follow-up)	0.76	0.62-0.91

CI: Confidence Interval. Receiver operating characteristic (ROC) analyses were used to detect the effects of different combinations of risk factors for MACE. The larger area under the ROC curve (AUC) indicates the better combination.