Circadian preferences and sleep in 15- to 20-year old Finnish students

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Lehto , J E , Aho , O , Eklund , M , Kettunen , S , Peltomäki , A , Ylä-Kotola , K , Öst , K & Partonen , T 2016 , ' Circadian preferences and sleep in 15- to 20-year old Finnish students ' , Sleep Science , vol. 9 , no. 2 , pp. 78-83 .

Title: Circadian preferences and sleep in 15- to 20-year old Finnish students
Author: Lehto, Juhani E.; Aho, Outi; Eklund, Mari; Kettunen, Sari; Peltomäki, Aila; Ylä-Kotola, Katja; Öst, Kaarina; Partonen, Timo
Contributor organization: Open University
HUS Psychiatry
Date: 2016-09
Language: eng
Number of pages: 5
Belongs to series: Sleep Science
ISSN: 1984-0659
Abstract: Purpose Despite progress in research concerning adolescent and young adult sleep and circadian preferences, several aspects have remained unexamined. This study explored gender and diurnal rhythms in relation to several sleep-related factors: sleep duration, bedtime, wake-up time, tiredness, sleepiness, and optimal subjective sleep duration Methods Circadian preferences and sleep were investigated in 555 (Females N=247) Finnish students aged 15–20. The self-report measures included a shortened version of the Horne-Östberg Morningness-Eveningness Scale, the Epworth Sleepiness Scale as well as items probing feelings of tiredness, optimal subjective sleep durations, and bedtime and wake-up time on the most recent day and a typical weekend. Data were collected from Tuesday to Thursday during an ordinary school week. Results and conclusion The most frequent chronotype was the intermediate type (54%), and compared to previous studies, the prevalence of evening-oriented individuals was high (37%), whereas only 9% of the participants were classified as morning oriented. No gender-specific or chronotype-specific differences in sleep durations were observed, but girls/women and evening-orientated individuals reported suffering more from sleepiness, compared to boys/men and more morning-typed participants, respectively. About 20% of the total sample indicated that their subjective need for sleep was not satisfied during the weekdays nor the weekend, indicating chronic sleep deprivation. Among girls/women and evening-oriented individuals, the subjective sleep need was greater for weekday nights.
Subject: 516 Educational sciences
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: publishedVersion

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