Table 5. Correlation between RLS score and demographic/clinical parameters with PSQI scores.

PSQI scores	Age		RLS score		UAS		VAS
	r*	P	r	P	r	P	r	P
SSQ	0.279	0.027	0.377	0.002	0.156	0.229	0.209	0.101
SL	0.135	0.209	0.373	0.003	0.312	0.065	0.375	0.002
SD	0.113	0.376	0.099	0.440	0.265	0.032	0.248	0.050
HSE	0.257	0.042	0.243	0.055	0.362	0.039	0.215	0.019
SDis	0.078	0.520	0.215	0.090	0.113	0.426	0.265	0.036
USM	0.072	0.577	0.162	0.206	-0.145	0.661	0.207	0.073
DD	-0.274	0.03	0.073	0.572	0.117	0.290	0.234	0.065
Total PSQI	0.158	0.215	0.323	0.010	0.378	0.039	0.398	0.001

RLS, restless legs syndrome; PSQI, Pittsburgh sleep quality index; UAS, urticaria activity score; VAS, visual analog scale for severity of itch; SSQ, subjective sleep quality; SL, sleep latency; SD, sleep duration; HSE, habitual sleep efficiency; SDis, sleep disturbances; USM, use of sleep medications; DD, daytime dysfunction; Total PSQI score, total Pittsburgh sleep quality index score.

*Spearman’s correlation coefficient.