TABLE 4.

Statistical analysis of ROC curve in identifying HF and each HF phenotypes.

Group	AUC	95%CI	Sensitivity	Specificity	Youden index	Cut-off criteria
Non-HF vs. HF	0.843	0.785–0.900	0.587	1.000	0.587	293.918
Non-HF vs. HFrEF	0.804	0.719–0.888	0.519	1.000	0.519	294.535
Non-HF vs. HFmrEF	1.000	1.000–1.000	1.000	1.000	1.000	314.220
Non-HF vs. HFpEF	0.815	0.731–0.900	0.780	0.739	0.519	255.705
HFrEF vs. HFmrEF	0.881	0.805–0.957	1.000	0.648	0.648	332.818
HFpEF vs. HFmrEF	0.931	0.877–0.985	0.955	0.800	0.755	348.132
HFrEF vs. HFpEF	0.529	0.416–0.641	0.880	0.296	0.176	/

ROC, receiver operative characteristics curve; non-HF, non-heart failure participants; HF, heart failure; HFrEF, heart failure with reduced ejection fraction; HFmrEF, heart failure with mildly reduced ejection fraction; HFpEF, heart failure with preserved ejection fraction; AUC, area under the curve; CI, confidence interval.