Table 5. The logistic regression results of poor sleep quality in medical students .

Variables	Normal sleep quality	Poor sleep quality	Odds ratio (95% CI)	P value
Cell-phone addiction
No	134	190	1.00
Yes	5	34	4.52 (1.80, 11.90)	0.002
Gender
Female	90	161	1.00
Male	49	63	1.54 (1.08, 2.43)	0.048
Educational level
Bachelor	99	137	1.00
General physician	39	86	1.61 (1.18, 2.54)	0.040