Table 3.

Association between poor sleep quality and characteristics or habits of university students.

Characteristics	Good sleep quality (%) n = 170	Poor sleep quality (%) n = 244	P-value	Unadjusted OR Poor sleep quality (CI 95%)
Sex
Women	40.6	59.4	0.744	1.07
Men	42.3	57.7		(0.70 - 1.65)
BMI*
Low or normal weight	43	57	0.035	1.99*
Overweight or obesity	27.4	72.6		(1.04 - 3.82)
School
Medicine	46.7	53.3	0.139	0.72
Other	38.8	61.2		(0.47 - 1.11)
Chronotype
Morning type	46.2	53.8	0.007	0.57*
Evening type	32.9	67.1		(0.38 - 0.86)
Living alone
Yes	52.1	47.9	0.099	0.60
No	39.6	60.4		(0.33 - 1.10)
Go to bed at the same time
Yes	55.2	44.8	0.000	0.36*
No	31	69		(0.24 - 0.55)
Wake up at the same time
Yes	47	53	0.007	0.57*
No	33.7	66.3		(0.39 - 0.86)
Taking naps
Yes	34.6	65.4	0.015	1.64*
No	46.5	53.5		(1.10 - 2.45)
Eat in bed
Yes	26.6	73.4	0.000	2.48*
No	47.4	52.6		(1.57 - 3.94)
Study in bed
Yes	41.3	58.7	0.830	0.92
No	39.4	60.6		(0.45 - 1.91)
Physical activity near to sleep time
Yes	37.1	62.9	0.354	1.25
No	42.4	57.6		(0.78 - 1.99)
Sleep in dark and quiet room
Yes	44.4	55.6	0.016	0.55*
No	30.5	69.5		(0.34 - 0.90)
Work and study
Yes	32.5	67.5	0.080	1.58
No	43.2	56.8		(0.94 - 2.65)

^*Statistically significant difference;

**Fisher exact adjustment; BMI: Body Mass Index.