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NCT Number: NCT06969599

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

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.

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Key information

Conditions

Sleep Quality Dyssomnias Mental Disorders Nervous System Diseases Sleep Disorders, Intrinsic Sleep Initiation and Maintenance Disorders Sleep Wake Disorders

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

  • 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);

Treatment and study plan

No intervention measures

Diagnostic Test

No intervention measures

Primary outcomes

  1. 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

Sponsors and collaborators

Lead sponsor

Nanfang Hospital, Southern Medical University

Other

Registry information

Official study title

The Impact of Bedtime Screen Use on Sleep Quality and Cognitive Function in Medical Graduate Students: A Cross Sectional Correlation Study

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
May 14, 2025
Registry last updated
May 14, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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