Sleep Research Clinic & Laboratory, Department of Psychology, The University of Hong Kong
Hong Kong
Completed
NCT Number: NCT04263428
The Effects of Sleep Variability in Youth
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.
Completed
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Notify MeKey information
Conditions
Age range
18 year–25 year
Sex eligibility
All sexes
Study type
Interventional
Phase
Not applicable
Primary location
Who can participate
Healthy volunteers accepted: Yes
Only the study team can determine whether someone qualifies for participation.
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.
Treatment and study plan
Irregular sleep
BehavioralExperimental-induced sleep variability
Primary outcomes
-
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 - Sustained attention
Time frame: 7 days (every morning and evening)
Sustained attention as measured by psychomotor vigilance task (PVT)
-
Cognitive functioning - processing speed
Time frame: 7 days
Processing speed as measured by Digit Symbol Substitution Test (DSST)
-
Cognitive functioning - inhibition
Time frame: 7 days
Inhibition as measured by stop-signal reaction time (SSRT)
-
Cognitive functioning - working memory
Time frame: 7 days
working memory as measured by 2-back task
Secondary outcomes
-
Sleep quality
Time frame: 7 days
Actual sleep time, sleep onset latency, wake after sleep onset and night time arousals as measured by actigraphy and PSG. Sleep satisfactory and dreams as measured by sleep diary.
-
Sleep architecture
Time frame: 7 days
Sleep stagings (e.g., SWS%, REM duration) and sleep EEG spectrums as analysed from PSG recordings.
-
Heart rate variability
Time frame: 7 days
Resting heart rate and heart rate variability are measured in the morning, evening and during the night.
-
Cortisol awakening response
Time frame: baseline, post-intervention
Cortisol awakening response is assessed before and after the manipulation.
Sponsors and collaborators
Lead sponsor
The University of Hong Kong
Other
Registry information
Official study title
The Effects of Sleep Variability on Sleep Quality, Daytime Functioning and Cardiometabolic Regulation in Youth
Important dates
- Study start
- 2019
- Primary completion
- 2021
- Study completion
- 2021
- First posted
- Feb 10, 2020
- Registry last updated
- May 11, 2021
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.