Sleep QualityNCT06969599
A Cross-sectional Study on the Correlation Between Screen Usage and Sleep and Cognition in Medical Students
An observational study of Sleep Quality, run by Nanfang Hospital, Southern Medical University.
Trial summary
The aim of this study is to investigate the effects of screen use within one hour before bedtime on sleep quality and cognitive function in medical graduate students, and to verify the mediating effect of sleep quality between the two. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Sleep Quality
- How many people
- 508 participants
- Where
- No sites listed yet
- Study dates
- 15 May 2025to 1 May 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 postgraduate
- Inclusion criteria:
- Full time medical graduate student at Southern Medical University
- Age ≥ 18 years old
- Exclusion criteria:
- Have taken the following medications within the past month: antibiotics, probiotics, sleeping pills, laxatives, or intestinal cleansers, etc;
- Serious gastrointestinal diseases (inflammatory bowel disease, Crohn's disease, gastric cancer, etc.);
- Recently (within one month) experienced major life events (such as the death of a relative, surgery);
About this study
Official title: The Impact of Bedtime Screen Use on Sleep Quality and Cognitive Function in Medical Graduate Students: A Cross Sectional Correlation Study
The aim of this study is to investigate the effects of screen use within one hour before bedtime on sleep quality and cognitive function in medical graduate students, and to verify the mediating effect of sleep quality between the two. The study adopted a cross-sectional observational design and planned to enroll 508 full-time medical graduate students. The primary endpoints were evaluated using the Pittsburgh Sleep Quality Index (PSQI) and standardized cognitive tests (N-back, ANT, etc.), while secondary endpoints included insomnia severity, anxiety/depression regulation, gut microbiota diversity, and the interaction between physical activity and sleep. Data collection includes questionnaire surveys (PSQI, ISI, GAD-7, etc.), cognitive task testing, and analysis of gut microbiota samples. The final result will provide scientific basis for improving the sleep and cognitive health of medical graduate students.
- Conditions
- Sleep Quality
- Being tested
- No intervention measures
- Keywords
- sleep
- Medical subject headings
- Sleep Initiation and Maintenance Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
No intervention measuresDiagnostic test
No intervention measures
What is being measured
The primary outcome is the main question the study is designed to answer.
Sleep questionnaire cognitive task
Sleep quality assessed through the Pittsburgh Sleep Quality Index (PSQI) total score,The higher the PSQI score, the more likely it is that the sleep quality is poor
Measured: baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 May 2025
- Study start15 May 2025 (estimated)
- Primary completion1 May 2026 (estimated)
- Study completion1 May 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Sleep QualityStudies 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
- Cross-sectional
- Enrolment
- 508 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Nanfang Hospital, Southern Medical University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06969599
- Sponsor's protocol ID
- NFEC-2025-144
- Status last verified
- May 2025
- First submitted
- 28 Apr 2025
- Last updated
- 14 May 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: 论文
Study at a glance
From the registry record, last updated by the sponsor on 14 May 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Impact of Bedtime Screen Use on Sleep Quality and Cognitive Function in Medical Graduate Students: A Cross Sectional Correlation Study
- ClinicalTrials.gov ID
- NCT06969599
- Acronym / sponsor ID
- NFEC-2025-144
- Conditions
- Sleep Quality
- Keywords
- sleep
- Study type
- Observational
- Recruitment status
- Not yet recruiting
- Enrolment
- 508 participants (estimated)
- Lead sponsor
- Nanfang Hospital, Southern Medical UniversityUniversity, hospital or other
- Study start
- 15 May 2025 (estimated)
- Primary completion
- 1 May 2026 (estimated)
- Study completion
- 1 May 2026 (estimated)
- First posted
- 14 May 2025 (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.
The aim of this study is to investigate the effects of screen use within one hour before bedtime on sleep quality and cognitive function in medical graduate students, and to verify the mediating effect of sleep quality between the two. The study adopted a cross-sectional observational design and planned to enroll 508 full-time medical graduate students. The primary endpoints were evaluated using the Pittsburgh Sleep Quality Index (PSQI) and standardized cognitive tests (N-back, ANT, etc.), while secondary endpoints included insomnia severity, anxiety/depression regulation, gut microbiota diversity, and the interaction between physical activity and sleep. Data collection includes questionnaire surveys (PSQI, ISI, GAD-7, etc.), cognitive task testing, and analysis of gut microbiota samples. The final result will provide scientific basis for improving the sleep and cognitive health of medical graduate students.
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- medical postgraduate
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| No intervention measuresNo intervention measures | Diagnostic test | – |
Primary outcome
Sleep questionnaire cognitive task
Time frame: baseline
Sleep quality assessed through the Pittsburgh Sleep Quality Index (PSQI) total score,The higher the PSQI score, the more likely it is that the sleep quality is poor
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 14 May 2025.
- Individual participant dataSharing planned: Yes. 论文
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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.
Questions about this trial
What is this clinical trial studying?
An observational study of Sleep Quality, run by Nanfang Hospital, Southern Medical University.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
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: opening soon, as of the sponsor's last update on 14 May 2025. Status can change between updates, so confirm with the study contact before making plans.
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?
Sleep questionnaire cognitive task (time frame: baseline). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 14 May 2025.