Table 3. The cutoff point for the parameters that maximizes the sum of sensitivity and specificity.

	Diagnostic interview			App-assisted diagnosis
	Cutoff point	Sensitivity	Specificity	Cutoff point	Sensitivity	Specificity
Non-use frequency	58.5 count per day	0.710	0.604	67.4 count per day	0.750	0.686
Non-use duration	52618.8 s per day	0.608	0.786	54801.8 s per day	0.479	0.839
Non-use-median	404.4 s per day	0.725	0.643	415.9 s per day	0.667	0.613
RMSSD	3498.2 s per day	0.647	0.786	3783.5 s per day	0.521	0.774
Similarity Index	857.5 s per day	0.625	0.677	857.5 s per day	0.667	0.786

Abbreviations: RMSSD, root mean square of the successive differences.