Tardiness increases in winter: Evidence for annual rhythms in humans

Giulia Zerbini*, Vincent van der Vinne, Lana K. M. Otto, Stefanie Monecke, Thomas Kantermann, Martha Merrow

*Bijbehorende auteur voor dit werk

    OnderzoeksoutputAcademicpeer review

    2 Citaten (Scopus)
    147 Downloads (Pure)


    Annual rhythms in humans have been described for a limited number of behavioral and physiological parameters. The aim of this study was to investigate time-of-year variations in late arrivals, sick leaves, dismissals from class (attendance), and grades (performance). Data were collected in Dutch high school students across 4 academic years (indicators of attendance in about 1700 students; grades in about 200 students). Absenteeism showed a seasonal variation, with a peak in winter, which was more strongly associated with photoperiod (number of hours of daylight) compared with other factors assessed (e.g., weather conditions). Grades also varied with time of year, albeit differently across the 4 years. The observed time-of-year variation in the number of sick leaves was in accordance with the literature on the seasonality of infectious diseases (e.g., influenza usually breaks out in winter). The winter peak in late arrivals was unexpected and requires more research. Our findings could be relevant for a seasonal adaptation of school schedules and working environments (e.g., later school and work hours in winter, especially at higher latitudes where seasonal differences in photoperiod are more pronounced).

    Originele taal-2English
    Pagina's (van-tot)672-679
    Aantal pagina's8
    TijdschriftJournal of Biological Rhythms
    Nummer van het tijdschrift6
    Vroegere onlinedatum23-sep.-2019
    StatusPublished - dec.-2019

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