A Cross-sectional Study on the Correlation Between Screen Usage and Sleep and Cognition in Medical Students

NCT06969599 | Not Yet Recruiting

• 1 other identifier: NFEC-2025-144
• Study Type: observational
• Target: 508
• Locations: 0 countries
• Sites: N/A

Brief 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. 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

Keywords

sleep

Outcome Measures

Primary Outcomes (1)

• 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

  baseline

Interventions

No intervention measures DIAGNOSTIC_TEST

No intervention measures

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

medical postgraduate

You may qualify if:

• Full time medical graduate student at Southern Medical University
• Age ≥ 18 years old

You may not qualify if:

• 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);

Sponsors & Collaborators

• Nanfang Hospital, Southern Medical University: lead

Biospecimen

Retention: SAMPLES WITHOUT DNA

stool specimen

MeSH Terms

Conditions

Sleep Initiation and Maintenance Disorders

Condition Hierarchy (Ancestors)

Sleep Disorders, Intrinsic; Dyssomnias; Sleep Wake Disorders; Nervous System Diseases; Mental Disorders

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 28, 2025
• First Posted: May 14, 2025
• Study Start: May 15, 2025
• Primary Completion: May 1, 2026
• Study Completion: May 1, 2026
• Last Updated: May 14, 2025

Record last verified: 2025-05

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP