Table 5.

Correlations for sleep disturbances and QOL

WHOQOL-BREF	Correlations with questionnaires
	ESS		AIS
	Pearson correlation	P-value	Pearson correlation	P
QOL perception	−0.478	<0.001	−0.432	<0.001
Health perception	−0.278	0.005	−0.295	0.003
Physical domain	−0.565	<0.001	−0.582	<0.001
Psychological domain	−0.554	<0.001	−0.52	<0.001
Social domain	−0.544	<0.001	−0.446	<0.001
Environmental domain	−0.546	<0.001	−0.437	<0.001

Note: P, level of statistical significance.

Abbreviations: AIS, Acceptance of Illness Scale; ESS, Epworth Sleepiness Scale; QOL, quality of life; WHOQOL-BREF, World Health Organization Quality of Life-Brief.