Table 3.

Linear mixed effect module analysis results-objective sleep quality.

	SOL		SE		TST		AT
	β	t value	β	t value	β	t value	β	t value
Constant	9.896	11.453***	89.683	63.286***	337.693	40.713***	15.089	8.738***
Time (week)
No-intervention	0.000	–	0.000	–	0.000	–	0.000	–
1	−1.274	−3.752***	0.368	0.554	6.106	1.939	0.741	1.505
2	−1.172	−3.451**	0.182	0.274	1.957	0.621	0.247	0.502
3	−1.658	−4.883***	1.631	2.455*	3.380	1.073	−0.173	−0.350
4	−1.624	−4.784***	0.623	0.938	2.722	0.864	0.138	0.280
Gender
Male	0.857	1.864	−3.245	−4.365***	−14.318	−3.252***	3.196	3.426**
Female	0.000	–	0.000	–	0.000	–	0.000	–
Grade
Freshman	−1.169	−1.281	0.901	0.610	13.789	1.578	−0.718	−0.388
Sophomore	−1.533	−1.778	1.031	0.740	−0.253	−0.031	−1.349	−0.771
Junior	0.000	–	0.000	–	0.000	–	0.000	–

^*p<0.05; ^**p<0.01; ^***p<0.001.