REST-Q scores positively correlated with sleep quality ( r = 0.61) and sleep duration ( r = 0.32), and negatively correlated with both difficulty falling asleep ( r = −0.40) and falling back asleep after waking ( r = −0.41). The prevalence of higher REST-Q scores (4 or 5 on the Likert scale) was 28.1% in the nationally representative sample. Weighted logistic regression analyses were conducted to compare scores on the REST-Q with demographic variables. Pairwise correlations were performed between the REST-Q scores and other self-reported sleep measures. Finally, we assessed the prevalence of high, somewhat, and low REST-Q scores in a nationally representative sample of US adults ( n = 1,055) and examined the relationship of REST-Q scores with other sleep and demographic characteristics. We then developed the revised Restorative Sleep Questionnaire (REST-Q), which comprises 9 items assessing feelings resulting from the prior sleep episode, each with 5-point Likert response scales. We convened a panel of 7 expert physicians and researchers to evaluate and enhance available measures of restorative sleep. Few studies have assessed restorative sleep in nationally representative samples. Restorative sleep is a commonly used term but a poorly defined construct.
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