Trial · NCT07889466
Circadian-informed Optimal Bedtime
NCT07889466, Not applicable, Completed, Massachusetts Institute of Technology
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. Circadian-informed Optimal Bedtime. Trials, record NCT07889466. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT07889466
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Circadian-informed Optimal Bedtime
- NCT number
- NCT07889466
- Status
- Completed
- Phases
- Not applicable
- Enrollment
- 203 participants, actual
- Lead sponsor
- Massachusetts Institute of Technology
- Conditions
- Sleep, Alertness, Fatigue, Mood, and Performance, Well-being
- Interventions
- Optimal Bedtime, Placebo
- First posted
- 2026-10-22
- Last updated
- 2026-10-23
Source ClinicalTrials.gov
Registered outcomes17
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Change from Baseline and Placebo in Total Sleep Time | 6 weeks, nightly in baseline, placebo, and intervention. | Smartwatch-derived objective total sleep time in minutes. |
| Primary | Change from Baseline and Placebo in the Count of Lapse in Psychomotor Vigilance Task (PVT) | 6 weeks, daily in baseline, placebo, and intervention. | Count of responses with reaction time greater than 500 milliseconds in a PVT session. |
| Primary | Change from Baseline and Placebo in Subjective Sleep Quality | 6 weeks, daily in baseline, placebo, and intervention. | Self-reported sleep quality score on a visual analogue scale of 0 to 100, higher indicating more favorable. |
| Secondary | Change from Baseline and Placebo in Sleep Efficiency | 6 weeks, nightly in baseline, placebo, and intervention. | Objective total sleep time divided by time in bed, in percentage points. |
| Secondary | Change from Baseline and Placebo in Sleep Fragmentation Index | 6 weeks, nightly in baseline, placebo, and intervention. | Waking bouts per 100 min of objective total sleep time. |
| Secondary | Change from Baseline and Placebo in Wake After Sleep Onset | 6 weeks, nightly in baseline, placebo, and intervention. | Objective total time awake after sleep onset and before wake onset, in minutes. |
| Secondary | Change from Baseline and Placebo in Deep Sleep Duration | 6 weeks, nightly in baseline, placebo, and intervention. | Smartwatch-derived deep sleep duration in minutes. |
| Secondary | Change from Baseline and Placebo in Deep Sleep Percentage | 6 weeks, nightly in baseline, placebo, and intervention. | Smartwatch-derived deep sleep in percentage of objective total sleep time. |
| Secondary | Change from Baseline and Placebo in Rapid Eye Movement (REM) Sleep Duration | 6 weeks, nightly in baseline, placebo, and intervention. | Smartwatch-derived REM sleep duration in minutes. |
| Secondary | Change from Baseline and Placebo in Rapid Eye Movement (REM) Sleep Percentage | 6 weeks, nightly in baseline, placebo, and intervention. | Smartwatch-derived REM sleep in percentage of objective total sleep time. |
1 to 10 of 17Source ClinicalTrials.gov
See all 17 registered outcomesOutcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers0
The papers the trial lists on ClinicalTrials.gov.
None in this release.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests1
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
| Test | Named as |
|---|---|
| Psychomotor Vigilance Task | Primary outcome |
Source ConductCognition
Data dates
The day each source was copied for this release.
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.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT07889466
GET https://conductscience.org/api/trials/v1/NCT07889466/registered