Figure 1From: The reliability, validity and responsiveness of the Restless Legs Syndrome Quality of Life questionnaire (RLSQoL) in a trial population Known groups validity. RLSQoL overall life impact scores by mild, moderate and severe sleep problems. p < 0.0001 for comparisons of RLSQoL overall life impact scores among sleep problems severity groups defined by taking tertile scores for the Sleep Problems Index II in TREAT RLS 1 and 2 (Kruskall-Wallis test). RLSQoL = RLS Quality of Life questionnaire.Back to article page