Table 2.

The averages of correlations for app-generated parameters between 3 time intervals and 2-month use.

Number	Parameters	1 week	2 weeks	4 weeks
1	Fa	.918	.952	.979
2	Db	.969	.988	.993
3	PFc	.900	.943	.975
4	PDd	.990	.996	.998
5	RMSSDe	.764	.903	.950
6	SIf	.902	.942	.975
7	CIg	.933	.969	.986

^aF: total use frequency.

^bD: total use duration.

^cPF: proactive use frequency.

^dPD: proactive use duration.

^eRMSSD: Root mean square of successive differences (between the adjacent duration of use and nonuse episodes).

^fSI: Similarity Index.

^gCI: Control Index.