Table 4.

Predictive value of variables for SCA

Variables	AUC	95%CI	Cut‐off value	P	Sensitivity	Specificity
SDNN	0.724	0.570–0.878	69.5 ms	0.019	70.0%	71.9%
VLF	0.807	0.671–0.942	1,009.5 ms2	<0.001	90.0%	63.3%
DC	0.804	0.689–0.908	3.5 ms	0.002	60.0%	87.5%
Combined assessment	0.828	0.728–0.929	–	<0.001	90.0%	69.5%

Abbreviations: DC, deceleration capacity of heart rate; SDNN, standard deviation of normal to normal RR intervals; VLF, very low frequency.