The Effects of Sleep Variability on Sleep Quality, Daytime Functioning and Cardiometabolic Regulation in Youth
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Sleep Variability
- Sponsor
- The University of Hong Kong
- Enrollment
- 41
- Locations
- 1
- Primary Endpoint
- Cognitive functioning - Sustained attention
- Status
- Completed
- Last Updated
- 4 years ago
Overview
Brief Summary
Daily sleep variability is prevalent in the young populations, yet its effects remain less clear. The experimental study aims to examine the impacts of intraindividual daily sleep variability on sleep characteristics, cardiometabolic regulations and daytime functioning in college students.
Investigators
Dr. Shirley Xin Li
Director of the Sleep Research Clinic and Laboratory
The University of Hong Kong
Eligibility Criteria
Inclusion Criteria
- •Habitual sleep duration \> 7 h/day.
Exclusion Criteria
- •Extreme morning- nor extreme evening-chronotype
- •With sleep problems
- •With mood and anxiety problems
- •With excessive daytime sleepiness
- •Have history of any chronic medical condition and on regular medication.
Outcomes
Primary Outcomes
Cognitive functioning - Sustained attention
Time Frame: 7 days (every morning and evening)
Sustained attention as measured by psychomotor vigilance task (PVT)
Cognitive functioning - inhibition
Time Frame: 7 days
Inhibition as measured by stop-signal reaction time (SSRT)
Subjective sleepiness
Time Frame: 7 days (every morning and evening)
As measured by the Stanford Sleepiness Scalen (SSS)
Mood
Time Frame: 7 days (every morning and evening)
mood state as measured by the Positive and Negative Affect Scale (PANAS).
Cognitive functioning - processing speed
Time Frame: 7 days
Processing speed as measured by Digit Symbol Substitution Test (DSST)
Cognitive functioning - working memory
Time Frame: 7 days
working memory as measured by 2-back task
Secondary Outcomes
- Cortisol awakening response(baseline, post-intervention)
- Sleep quality(7 days)
- Heart rate variability(7 days)
- Sleep architecture(7 days)