Adolescence associates with alterations in sleep-wake organization, such as later circadian phase preference. Simultaneously external pressures, such as evening-driven social activities increase. These may lead to delayed sleep phase, which may cause serious problems for waking up at socially accepted times, and absenteeism from the school may follow. This project aims at tracking risk factors for later circadian regulation problems, characterizing interconnections of biological, psychological and behavioural mechanisms that maintain or induce poor sleep regulation in adolescence, and building a cost-effective, theoretically-based sleep intervention for adolescents with delayed sleep phase. This randomized control trial capitalizes on a new population-based cohort of 16-17-year olds.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
270
A new mobile application for assisting in sleep regulation, duration 4-6 weeks
A new personalized program, duration 4-6 weeks
Morning bright light 10 000 lux maximum duration 4-6 weeks
Minimal information on sleep timing and advancing the sleep rhythm
An extensive information platform in the internet created for this purpose
University of Helsinki
Helsinki, Helsinki, Finland
Circadian sleep rhythm
Actigraphy (brand GeneActiv)
Time frame: 8 weeks
Circadian body temperature rhythm
iButton measurement from the wrist
Time frame: 8 weeks
Mood
Experience sampling method, brand Psymate
Time frame: 8 weeks
Insomnia symptoms
Bergen Insomnia Scale
Time frame: 8 weeks
Sleep problems
Pittsburgh Sleep Quality Index
Time frame: 8 weeks
Depression
Beck Depression Inventory
Time frame: 8 weeks
Anxiety
Generalized Anxiety Disorder questionnaire GAD-7
Time frame: 8 weeks
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