SleepSSMTNCT06706453
Sleep Survey for Medical Trainees
An observational study of Sleep and Shift Work, run by King's College London at 1 site in United Kingdom.
Trial summary
Background This is a survey to understand sleep in the context of medical trainees (on call) and the participants knowledge about the relevance of sleep, shiftwork, and the impact that sleep may have on their working performance. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Sleep, Shift Work, Circadian Rhythm
- How many people
- 1,000 participants
- Where
- 1 siteUnited Kingdom
- Study dates
- 28 Feb 2025to Jun 2026
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Medical staff that undertakes on call work (medical student, intern, fellow, resident, consultant)
Who may be able to join
- medical staff
- student / intern / fellow / resident / consultant
- delivering on call work
- any gender
Who cannot join
- non-medical staff working in hospitals from the wider multidisciplinary team
- underage (less than 18 years)
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Sleep Survey for Medical Trainees: A Collaboration Between the World Sleep Society and National Sleep Centre / Sleep Societies
Background
This is a survey to understand sleep in the context of medical trainees (on call) and the participants knowledge about the relevance of sleep, shiftwork, and the impact that sleep may have on their working performance. The survey has been developed by sleep experts from America, Europe, and Africa, in collaboration with the World Sleep Society. It should take about 30-40 minutes to complete.
The survey will focus on three different aspects, complemented by two standard questionnaires:
- Demographics and Place of Work
- Basic Knowledge and Perception of Sleep
- Sleep Routine
- Epworth Sleepiness Scale, Insomnia Sleep Inventory
- Conditions
- Sleep, Shift Work, Circadian Rhythm, Sleep Apnea, Insomnia
- Keywords
- Medical training, on call, working time
- Medical subject headings
- Sleep Apnea Syndromes, Sleep Initiation and Maintenance Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Medical staff | Anyone who works in medicine with any on call commitment (student, intern, fellow, resident, consultant) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Impact of being ON CALL in the hospital on sleep
Composite outcome as described by deviation from regular sleep in terms of sleep quality (points, out of 10; higher scores indicating more symptoms), quantity (duration, hours:mins), and deviation from circadian rhythm (measured in times of the day and duration, as well as perceived disturbance, points out of 10; higher points indicating more symptoms)
Measured: cross-sectional survey (while filling in the questionnaire); experience within 3 months of completion
Secondary outcomes (5)
Demographics
Basic demographics, family status/children
Measured: within 3 months of completion of survey
Sleep routine
Sleep routine while ON CALL / not ON CALL (bed time, hours:mins; wake up time, hours:mins)
Measured: within 3 months of completion of survey
Epworth Sleepiness Scale
Validated screening questionnaire containing eight questions related to likelihood of dozing (min score 0, max score 24 points; higher scores indicate more symptoms)
Measured: within 3 months of completion
Insomnia Severity Index
Validated questionnaire assessing likelihood of insomnia (7 questions, min 0 / max 28 points; higher scores indicate more symptoms)
Measured: within 3 months of completion
Basic knowledge and perception of sleep
Impact of work/on call on sleep (duration of sleep, hours:mins; sleep quality, points out of 10; symptoms, points out of 10; higher scores indicating more symptoms)
Measured: within 3 months of completion of survey
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Nov 2024
- Study start28 Feb 2025
- Primary completionJun 2026 (estimated)
- Study completionJun 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for SleepStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 1,000 participants (estimated)
Sponsor and investigators
- Lead sponsor
- King's College London
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06706453
- Sponsor's protocol ID
- MRA-23/24-45277
- Acronym
- SSMT
- Status last verified
- Mar 2026
- First submitted
- 11 Sep 2024
- Last updated
- 20 Mar 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided: Acquired data may be subject to underlying legislation (according to country, e.g. GDPR). In reasonable cases and upon written request / following ethics committee approval data sharing for the purpose of IPD analysis will be considered case-by-case.
Publications
Lim DC, Najafi A, Afifi L, Bassetti C, Buysse DJ, Han F, Hogl B, Melaku YA, Morin CM, Pack AI, Poyares D, Somers VK, Eastwood PR, Zee PC, Jackson CL; World Sleep Society Global Sleep Health Taskforce. The need to promote sleep health in public health agendas across the globe. Lancet Public Health. 2023 Oct;8(10):e820-e826. doi: 10.1016/S2468-2667(23)00182-2.
PubMed 37777291Zhang C, Raj JJRM, Spruyt K, Komolafe M, Mutschelknaus M, DelRosso LM, Steier J. On-call work schedules, sleep knowledge, and sleep quality in medical trainees: results from a UK pilot study. J Thorac Dis. 2026 Jul 31;18(7):738. doi: 10.21037/jtd-2026-1-0288. Epub 2026 Jul 28.
PubMed 42583379Zhang C, Spruyt K, Komolafe M, Mutschelknaus M, DelRosso LM, Steier J. Relationship between shift scheduling, sleep knowledge and sleep quality in medical trainees: protocol for a global cross-sectional survey. J Thorac Dis. 2025 Aug 31;17(8):6339-6347. doi: 10.21037/jtd-2025-291. Epub 2025 Aug 28.
PubMed 40950851
Study at a glance
From the registry record, last updated by the sponsor on 20 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Sleep Survey for Medical Trainees: A Collaboration Between the World Sleep Society and National Sleep Centre / Sleep Societies
- ClinicalTrials.gov ID
- NCT06706453
- Acronym / sponsor ID
- SSMT / MRA-23/24-45277
- Conditions
- Sleep, Shift Work, Circadian Rhythm, Sleep Apnea, Insomnia
- Keywords
- Medical training, on call, working time
- Study type
- Observational
- Recruitment status
- Enrolling by invitation
- Enrolment
- 1,000 participants (estimated)
- Lead sponsor
- King's College LondonUniversity, hospital or other
- Study start
- 28 Feb 2025 (actual)
- Primary completion
- Jun 2026 (estimated)
- Study completion
- Jun 2026 (estimated)
- First posted
- 26 Nov 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Background
This is a survey to understand sleep in the context of medical trainees (on call) and the participants knowledge about the relevance of sleep, shiftwork, and the impact that sleep may have on their working performance. The survey has been developed by sleep experts from America, Europe, and Africa, in collaboration with the World Sleep Society. It should take about 30-40 minutes to complete.
The survey will focus on three different aspects, complemented by two standard questionnaires:
- Demographics and Place of Work
- Basic Knowledge and Perception of Sleep
- Sleep Routine
- Epworth Sleepiness Scale, Insomnia Sleep Inventory
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Medical staff | – | –Anyone who works in medicine with any on call commitment (student, intern, fellow, resident, consultant) |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Medical staff that undertakes on call work (medical student, intern, fellow, resident, consultant)
Key inclusion criteria (4 listed)
- medical staff
- student / intern / fellow / resident / consultant
- delivering on call work
- any gender
Key exclusion criteria (2 listed)
- non-medical staff working in hospitals from the wider multidisciplinary team
- underage (less than 18 years)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Impact of being ON CALL in the hospital on sleep
Time frame: cross-sectional survey (while filling in the questionnaire); experience within 3 months of completion
Composite outcome as described by deviation from regular sleep in terms of sleep quality (points, out of 10; higher scores indicating more symptoms), quantity (duration, hours:mins), and deviation from circadian rhythm (measured in times of the day and duration, as well as perceived disturbance, points out of 10; higher points indicating more symptoms)
5 secondary outcomes
Demographics
Time frame: within 3 months of completion of survey
Sleep routine
Time frame: within 3 months of completion of survey
Epworth Sleepiness Scale
Time frame: within 3 months of completion
Insomnia Severity Index
Time frame: within 3 months of completion
Basic knowledge and perception of sleep
Time frame: within 3 months of completion of survey
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Mar 2026.
- Background: PubMed 37777291Lim DC, Najafi A, Afifi L, Bassetti C, Buysse DJ, Han F, Hogl B, Melaku YA, Morin CM, Pack AI, Poyares D, Somers VK, Eastwood PR, Zee PC, Jackson CL; World Sleep Society Global Sleep Health Taskforce. The need to promote sleep health in public health agendas across the globe. Lancet Public Health. 2023 Oct;8(10):e820-e826. doi: 10.1016/S2468-2667(23)00182-2.
- Derived from this study: PubMed 42583379Zhang C, Raj JJRM, Spruyt K, Komolafe M, Mutschelknaus M, DelRosso LM, Steier J. On-call work schedules, sleep knowledge, and sleep quality in medical trainees: results from a UK pilot study. J Thorac Dis. 2026 Jul 31;18(7):738. doi: 10.21037/jtd-2026-1-0288. Epub 2026 Jul 28.
- Derived from this study: PubMed 40950851Zhang C, Spruyt K, Komolafe M, Mutschelknaus M, DelRosso LM, Steier J. Relationship between shift scheduling, sleep knowledge and sleep quality in medical trainees: protocol for a global cross-sectional survey. J Thorac Dis. 2025 Aug 31;17(8):6339-6347. doi: 10.21037/jtd-2025-291. Epub 2025 Aug 28.
- Sleep wellbeing (NHS Hospital)Link provided by the sponsor.
- Working hours (UK Government)Link provided by the sponsor.
- Health and Safety Executive: Fatigue (UK Government)Link provided by the sponsor.
- Tips to consider to fight fatigue at work (Association of Anaesthetists)Link provided by the sponsor.
- Individual participant dataSharing planned: Undecided. Acquired data may be subject to underlying legislation (according to country, e.g. GDPR). In reasonable cases and upon written request / following ethics committee approval data sharing for the purpose of IPD analysis will be considered case-by-case.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Sleep and Shift Work, run by King's College London at 1 site in United Kingdom.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: enrolling by invitation, as of the sponsor's last update on 20 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Impact of being ON CALL in the hospital on sleep (time frame: cross-sectional survey (while filling in the questionnaire); experience within 3 months of completion). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT06706453, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Mar 2026.