Clinical trial NCT05555186: The Effects of Bright Light Therapy on Adolescent's Sleep Quality and Well-being
Official title: Effect of School Based Ambient Bright White Light Intervention on Adolescents´ Sleep Quality, Depression and Mood
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Sleep Disturbance
Depression
Mood
Circadian Rhythms
Keywords: Light Therapy
Sleep Disturbance
Adolescents
Well-being
Circadian Rhythms
Lead sponsor: Reykjavik University
Sponsor class: OTHER
Collaborators: name: The Icelandic Research Fund
First posted: 2022-09-26
Enrollment: 240
Sex: ALL
Minimum age (years): 15
Maximum age (years): 17
Standard ages: CHILD
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Sleep problems are common among adolescents which can have a variety of serious biological, emotional, cognitive and psychological consequences. Numerous studies have shown that adolescents who suffer from insufficient sleep and poor sleep quality experience decreased mental well-being which is a growing concern in modern societies.

Effective interventions that enhance sleep quality among adolescents are lacking. One possible reason for sleep problems among adolescents is disturbance in the body's circadian rhythms. As light is known to be the main coordinating factor in circadian rhythms, light therapy is an auspicious method which aims to entrain the circadian rhythms, thereby enhancing sleep quality and well-being. Indeed, bright light therapy (BLT) has been shown to be a promising treatment to improve sleep and decrease depressive symptoms among different patient groups. However, BLT interventions among healthy adolescents are needed. Therefore, the current study will investigate whether BLT in classrooms of 16 year old students can improve their sleep quality and well-being. The results from the study can be important as it is the first one to examine whether light intensity in the classroom affects sleep and well-being among adolescents. Furthermore, if the hypothesis will be supported, a simple and relatively inexpensive method can be implemented to promote better sleep quality and thus have an extensive effect on adolescents' well-being.

Aim 1 - Assess whether BLT will improve sleep quality of adolescents. Aim 2 - Assess whether BLT will decrease depressive symptoms in adolescents. Aim 3 - Assess whether BLT will improve mood in adolescents.


Eligibility criteria: Inclusion Criteria:

* First-year students at the school where the research takes place.
* Participants provide written informed consent.
* Parents or caregivers of participants provide informed consent.
* Read and write Icelandic.

Exclusion Criteria:

* Not first-year students.
* Participant or parent does not provide written informed consent.
* Not capable of reading and writing Icelandic.

Primary outcomes:
measure: ActTrust: Sleep/wake activity
timeFrame: Up to 9 months
measure: ActTrust: Circadian Activity Rhythms
timeFrame: Up to 9 months
measure: ActTrust: Daily physical activity
timeFrame: Up to 9 months
measure: ActTrust: Environmental light exposure
timeFrame: Up to 9 months
measure: Pittsburgh Sleep Quality Index
timeFrame: Up to 9 months
measure: The Warwick-Edinburgh Mental Well-being Scale
timeFrame: Up to 9 months
measure: Munich Chronotype Questionnaire (MCTQ)
timeFrame: Up to 9 months
measure: PROMIS cognitive function and cognitive abilities 8a
timeFrame: Up to 9 months
measure: Depression Anxiety Stress Scales (DASS 21)
timeFrame: Up to 9 months
measure: The Cleveland Adolescent Sleepiness Questionnaire
timeFrame: Up to 9 months
measure: Adolescents Daytime Naps
timeFrame: Up to 9 months
measure: Adolescents Screen Time
timeFrame: Up to 9 months
measure: Physical activity
timeFrame: Up to 9 months
measure: Sedentary behaviour
timeFrame: Up to 9 months
Secondary outcomes:
Other outcomes:
Locations:
city: Reykjavik
country: Iceland
facility: Reykjavik University
Study officials:
affiliation: Reykjavik University
name: Birna Baldursdottir, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: Reykjavik University
name: Heiddis B. Valdimarsdottir, PhD
role: STUDY_CHAIR
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