Development of Late Circadian Preference: Sleep Timing From Childhood to Late Adolescence - 23/02/18
Abstract |
Objectives |
To assess differences relating to circadian preference in objectively measured sleep patterns from childhood to adolescence over a 9-year period. We hypothesized there is developmental continuity in sleep timing and duration according to circadian preference.
Study design |
Young participants (N = 111, 65% girls) from a community-based birth cohort underwent sleep actigraphy at mean ages 8.1 (SD = 0.3), 12.3 (SD = 0.5), and 16.9 (SD = 0.1) years. A short version of Morningness-Eveningness Questionnaire was administered in late adolescence. At each follow-up, sleep midpoint, duration, wake after sleep onset, sleep efficiency, and weekend catch-up sleep were compared between those reporting morning, intermediate, and evening preferences in late adolescence.
Results |
Mixed model analyses indicated that sleep timing was significantly earlier among morning types compared with evening types at all ages (P values < .04). The mean differences in sleep midpoint between morning and evening types increased from a mean of 19 minutes (age 8), 36 minutes (age 12), to 89 minutes (age 17). The largest change occurred from age 12 to 17 years. Sleep duration, wake after sleep onset, sleep efficiency, and catch-up sleep did not differ according to circadian preference.
Conclusions |
This study found significant continuity in sleep timing from childhood to adolescence over 9 years, indicating that late circadian preference reported in late adolescence begins to manifest in middle childhood. Further studies are needed to establish whether sleep timing has its origins at an even earlier age.
Le texte complet de cet article est disponible en PDF.Keywords : morningness, eveningness, chronotype, poor sleep, sleep midpoint
Abbreviations : BMI, MD, MEQ, T1, T2, T3, WASO
Plan
Supported by The Academy of Finland (1287174), the Juho Vainio Foundation, the Signe and Ane Gyllenberg Foundation, the PsyCo Doctoral Programme of Psychology, the Sigrid Jusélius Foundation, the Foundation for Pediatric Research, the Novo Nordisk Foundation, the Emil Aaltonen Foundation, and the Australian Research Council. M.G. received funding from Re-Timer Pty Ltd, is a paid consultant for the Australian Psychological Society and Little Brown Book Company, and owns stock in ResMed. The other authors declare no conflicts of interest. |
Vol 194
P. 182 - mars 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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