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

Juhani E. Lehto, Outi Aho, Mari Eklund, Sari Kettunen, Aila Peltomäki, Katja Ylä-Kotola, Kaarina Öst, Timo Partonen

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review


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
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.
TidskriftSleep Science
Sidor (från-till)78-83
Antal sidor5
StatusPublicerad - sep. 2016
MoE-publikationstypA1 Tidskriftsartikel-refererad


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