Table 2.

Comparison of the components of PSQI in cases and controls

PSQI components score	Cases (n = 131)	Controls (n = 104)	p
Subjective sleep quality	1.23 ± 0.74	0.63 ± 0.73	<0.001
Sleep latency	1.70 ± 1.04	0.70 ± 0.74	<0.001
Sleep duration	0.80 ± 1.05	0.70 ± 1.00	0.451
Habitual sleep efficiency	1.16 ± 1.19	0.15 ± 0.41	<0.001
Sleep disorders	1.65 ± 0.69	0.90 ± 0.72	<0.001
Use of sleep medications	0.52 ± 1.04	0.06 ± 0.27	<0.001
Daytime dysfunction	0.88 ± 0.74	0.73 ± 0.80	0.148
Total	7.93 ± 3.98	3.88 ± 1.89	<0.001

Data are means (standard deviation) for continuous variables

p values were obtained with the two-tailed t test