Registered outcomes12

Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.

1 to 12 of 12

List	Outcome	Time frame	Description
Primary	Number of Participants with Increased/Decreased/Same Dose Transitioning from Xyrem to Xywav	Baseline to 21 Weeks	• Difference between usual Xyrem total nightly dose and initial prescribed total nightly Xywav dose.
Secondary	Number Prescribed Dose Adjustments of Xywav	Baseline to 21 Weeks	The number of dosing adjustments per participants and number of participants with one or more dosing adjustments during the Xywav Treatment Period (Period 2 to 5) by treating physician (dosing amount or number of nightly doses), details of adjustment, reason for adjustment and reason for unequal dosing will be summarized.
Secondary	Duration of Time Between the Last Meal Relative to Dosing	Baseline to 21 Weeks	Timing and type of last meal prior to the first dose will be collected using both Daily Diary and Weekly Lookback of Daily Diary. The timing will be collected as actual time (HH:MM) from Daily Diary and as categorical data of usual number of hours relative to first dose (\<0.5 hours, ≥0.5 but \<1 hours, ≥1 but \<1.5 hours, ≥1.5 but \<2 hours, ≥2 hours) from Weekly Lookback of Daily Diary. In order to evaluate the timing of last meal across all study periods, the Daily Diary entry will be converted into categorical data using the same value scale as Weekly Lookback of Daily Diary. The type of last meal prior to the first dose will be collected as categorical data (regular meal, snack, and beverage). For both timing and type of last meal prior to the first dose, the number of participants with each response will be summarized.
Other	Time to Achieve Stable Dose of Xywav	Baseline to 21 Weeks	Stable dose is defined as the dose and regimen which remain unchanged for at least 2 weeks. Compliance is not considered in the derivation of the time to stable dose. The time to achieve stable dose will be summarized.
Other	Number of Participants Achieving Treatment Adherence	Baseline to 21 Weeks	Skipped doses will be collected using both the Daily Diary and Weekly Lookback Daily Diary. Skipped doses will be collected daily (yes/no) from the Daily Diary and as a weekly categorical variable (0, 1-2, 3-4, 5-6, or 7 days) from the Weekly Lookback of Daily Diary. In order to summarize skipped doses during the Xywav Treatment Period, the Daily Diary data will be converted to categorical data using the same categories as in the Weekly Lookback of Daily Diary. Skipped doses per week (0, 1-2, 3-4, 5-6, 7 days), most common dosing change (did not take Xywav, skipped first dose, skipped second dose, skipped third dose) and most common reasons for dosing change will be summarized.
Other	Number of Participants Who Discontinued Xywav Administration	Baseline to 21 Weeks	The number of participants who discontinued Xywav administration during the Xywav Treatment Period (Period 2 to 5).
Other	Change in Short-term and Long-term Nausea Using Patient Global Impression of Change (PGI-C)	Baseline to 21 Weeks	The PGI-C is a series of self-administered questions designed to measure the meaningfulness of change in symptoms following an intervention. The PGI-C is used to assess the change in excessive daytime sleepiness, cataplexy, and short- and long-term nausea since the transition from Xyrem to Xywav. It is a 7-point Likert-type rating scale from 1 = very much improved, 2 = much improved, 3 = minimally improved, 4 = no change, 5 = minimally worse, 6 = much worse, to 7 = very much worse. The score is the sum of responses to each of the answer choices.
Other	Changes in Sleep Pattern and Quality	Baseline to 21 Weeks	Sleep pattern (how long usually took to fall asleep after the first dose, how long usually spent awake during the night) will be summarized. Sleep pattern and quality will be collected using both Daily Diary and Weekly Lookback of Daily Diary. The number of participants with each response to sleep quality (very poor \~ very good) and feeling on how rested/refreshed when woke-up for the day (not at all rested \~ very well rested) will be summarized by day and by week. In order to analyze the data together the intention is to combine the daily by deriving the categorical frequency for the responses so that it can be combined with the categorical data collected in the weekly diary. Which will allow for a full analysis of the change from the Baseline period (Xyrem) to Xywav Treatment Period (Period 2 to 5) will be summarized for weekly data collected during the Xywav Treatment Period (Period 2 to 5) using Weekly Lookback of Daily Diary.
Other	Change in Epworth Sleepiness Scale (ESS)	Baseline to 21 Weeks	The ESS is a self-administered questionnaire with 8 questions (Johns 1991, Johns 1992). Respondents rate on a 4-point scale (0-3) their usual chances of dozing off or falling asleep while engaged in eight different activities. Most people engage in those activities at least occasionally, although not necessarily every day. The ESS total score (the sum of 8 item scores, 0-3) can range from 0 to 24. Higher ESS total scores are associated with higher sleep propensity in daily life, also referred to as 'daytime sleepiness'. The ESS has been validated in several conditions, including narcolepsy (Johns 1994).
Other	Change in Functional Outcomes of Sleep Questionnaire (FOSQ-10) Total Score	Baseline to 21 Weeks	The FOSQ-10 (Chasens 2009) is a self-administered questionnaire designed to assess the impact of daytime sleepiness on activities of daily living. It consists in 10 items measuring the participant's general productivity, activity level, vigilance, and intimacy and sexual relationships. For each item, participants are asked to rate the level of difficulty in completing an activity on a 4-point Likert scale, from 1 "Yes, extreme" to 4 "No"). From the FOSQ-10 a total score is calculated: a higher score indicates better functional status. The FOSQ-10 is a reduced version of the original FOSQ-30. The FOSQ-10 was tested and found to be a psychometrically strong instrument performing similarly to the long version.
Other	Change in British Columbia Cognitive Complaint Inventory (BC-CCI) Total Score	Baseline to 21 Weeks	The BC-CCI was developed to measure cognitive complaints in individuals with Major Depressive Disorder (MDD). It is a 6-item self-report measure that asks respondents to rate problems with specific cognitive symptoms over the past 7 days. A four point scale (0 "Not at all" to 3 "Very much") is used to rate each item. The total score (ranges from 0 to 18) that is generated assesses domains of memory, concentration, trouble expressing thoughts, word-finding, and problem solving. Higher scores indicate greater severity of cognitive impairment, with four established classification ranges for the BC-CCI total score: 0 to 4 = "broadly normal"; 5 to 8 = "mild" cognitive complaints; 9 to 14 = "moderate" cognitive complaints; and 15 to 18 = "severe" cognitive complaints. Three additional items that ask about how these symptoms impact work, relationships and social/recreational activities are also included to provide further information on the nature of functional impairment.
Other	Change in Cataplexy using PGI-c	Baseline to 21 Weeks	The PGI-C is a series of self-administered questions designed to measure the meaningfulness of change in symptoms following an intervention. The PGI-C is used to assess the change in excessive daytime sleepiness, cataplexy, and short- and long-term nausea since the transition from Xyrem to Xywav. It is a 7-point Likert-type rating scale from 1 = very much improved, 2 = much improved, 3 = minimally improved, 4 = no change, 5 = minimally worse, 6 = much worse, to 7 = very much worse. The score is the sum of responses to each of the answer choices.

Source ClinicalTrials.govtrials-2026-11-12-0.5.0

Sources 3

ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
ClinicalTrials.govNo license stated
NIH RePORTER's clinical studies and project filesPublic domain

Each source's terms

ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
ClinicalTrials.govnone stated
NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)

ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.

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