Table 3. Correlations between sleep disorder and pain severity, duration of pain, quality of life, and disability in patients with CWP.

		VAS	Pain duration	PCS	MCS	HAQ
Sleep disorder	r	0.069	−0.049	0.068	−0.255	0.055

CWP: chronic widespread pain; VAS: visual analog scale; PCS: Physical Component Summary; MCS: Mental Component Summary; HAQ: health assessment questionnaire. r: correlation coefficient