Table 2. Basic results of tests of physical exercise and sleep quality in university students.

Index		Overall		Gender				Grade
				Male (n = 2031)		Female (n = 3044)		1 (n = 1815)		2 (n = 2292)		3 (n = 589)		4 (n = 379)
		n	%	n	%	n	%	n	%	n	%	n	%	n	%
Sleep quality
	Very good	1196	23.567	577	28.410	619	20.335	498	27.438	490	21.379	135	22.920	73	19.261
	Not bad	2262	44.571	803	39.537	1459	47.930	865	47.658	1004	43.805	222	37.691	171	45.119
	Poor	1143	22.522	425	20.926	718	23.587	357	19.669	528	23.037	162	27.504	96	25.330
	Very poor	474	9.340	226	11.128	248	8.147	95	5.234	270	11.780	70	11.885	39	10.290
	χ2			68.370				96.214
	p			<0.001				<0.001
	Cramer’s V			0.116				0.138
Physical exercise
	Minimal	3863	76.118	1208	59.478	2655	87.221	1367	75.317	1776	77.487	434	73.684	286	75.462
	Moderate	693	13.655	391	19.252	302	9.921	277	15.262	279	12.173	80	13.582	57	15.040
	Active	519	10.227	432	21.270	87	2.858	171	9.421	237	10.340	75	12.733	36	9.499
	χ2			604.672				18.846
	p			<0.001				<0.001
	Cramer’s V			0.345				0.052