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Table 3 Construct validity and reliability of the RLSQoL overall life impact score

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

 

TREAT RLS 1

TREAT RLS 2

Item-convergent validity, % items with item-scale correlation ≥ 0.40 (coefficient range)

85% (0.35–0.66)

100% (0.46–0.70)

Floor/ceiling effects (% of respondents with minimum/maximum scale scores)

0.35%/0.00%

0.00%/0.38%

Internal consistency reliability, Cronbach's alpha coefficient (satisfactory if ≥ 0.70)

0.82

0.87

  1. RLSQoL = Restless Legs Syndrome Quality of Life questionnaire.
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Health and Quality of Life Outcomes

ISSN: 1477-7525

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