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Change from baseline in refreshing nature of sleep (modified intent-to-treat population). A mixed-effects model for repeated measures was used for refreshing nature of sleep analyses. Least-squares mean (LSM) change from baseline in patient-reported refreshing nature of sleep for patients receiving once-nightly sodium oxybate (ON-SXB) or matching placebo. CI confidence interval, SD standard deviation, SE standard error, VAS visual analog scale
