The reliability, validity and responsiveness of the Restless Legs Syndrome Quality of Life questionnaire (RLSQoL) in a trial population

Table 4 Concurrent validity: correlations between the RLSQoL overall life impact score and the scores for the IRLS total score and the MOS Sleep Problems Index II (TREAT RLS 1 and 2)^a

RLSQoL overall life impact score		IRLS total score	MOS Sleep Scale Sleep Problems Index II
TREAT RLS 1	Spearman correlation coefficient	-0.68	-0.59
	p value	< 0.0001	< 0.0001
	Number of patients	284	284
TREAT RLS 2	Spearman correlation coefficient	-0.67	-0.60
	p value	< 0.0001	< 0.0001
	Number of patients	263	263

IRLS = International Restless Legs Scale. RLSQoL = Restless Legs Syndrome Quality of Life questionnaire. MOS = Medical Outcomes Study.
^a Satisfactory if correlation ≥ 0.40.

ISSN: 1477-7525