Table 1.

Mean score±standard deviation of each questionnaire based on the background variables

Background variableQuestionnaire	Sex		Married		Dormitory		Educational Level
	Male	Female	Yes	No	Yes	No	B.S	P	C
Depression score	11.40±8.74	10.85±10.11	6.08±7.05	11.44±9.48	11.53±9.63	10.05±8.83	11.40±8.85	13.19±11.68	9.91±8.95
	0.158		0.002*		0.152		0.138
Anxiety score	8.72±7.31	8.82±7.96	6.46±7.09	8.96±7.64	9.21±7.91	7.86±7.17	9.49±7.46	8.74±8.38	7.93±7.45
	0.781		0.071		0.098		0.078
Stress score	14.51±8.72	15.05±9.60	10.31±7.93	15.07±9.15	15.24±9.27	13.74±8.92	15.91±8.80	14.77±10.34	13.29±8.91
	0.581		0.009*		0.106		0.022*
PSQI score	6.09±3.22	6.24±3.60	6.27±3.52	6.19±3.46	6.69±3.66	5.35±2.93	5.75±3.25	5.74±3.62	6.77±3.53
	0.940		0.769		<0.001*		0.008*
IAT score	44.98±13.86	43.41±12.95	42.69±15.91	44.40±13.27	44.75±13.30	43.33±13.84	46.26±13.36	41.58±13.28	42.85±13.27
	0.351		0.332		0.228		0.009*

B.S – Basic sciences; P – Physiopathology; C – Clinical; PSQI – Pittsburgh sleep quality index; IAT – Internet addiction test. Doubled score of each subscale of DASS-21 is shown in the table; P of each Mann-Whitney U-test or Kruskal-Wallis test is shown beneath the mean scores. *Significant P