Cited by 1,545Circadian rhythm and melatoninSleep and related disordersSleep and Work-Related Fatigue

Epidemiology of the human circadian clock

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Roenneberg, Till, Kuehnle, Tim, Juda, Myriam, Kantermann, Thomas, Allebrandt, Karla, Gordijn, Marijke, Merrow, Martha·2007·Sleep Medicine Reviews

Abstract

Humans show large inter-individual differences in organising their behaviour within the 24-h day-this is most obvious in their preferred timing of sleep and wakefulness. Sleep and wake times show a near-Gaussian distribution in a given population, with extreme early types waking up when extreme late types fall asleep. This distribution is predominantly based on differences in an individuals' circadian clock. The relationship between the circadian system and different "chronotypes" is formally and genetically well established in experimental studies in organisms ranging from unicells to mammals. To investigate the epidemiology of the human circadian clock, we developed a simple questionnaire (Munich ChronoType Questionnaire, MCTQ) to assess chronotype. So far, more than 55,000 people have completed the MCTQ, which has been validated with respect to the Horne-Østberg morningness-eveningness questionnaire (MEQ), objective measures of activity and rest (sleep-logs and actimetry), and physiological parameters. As a result of this large survey, we established an algorithm which optimises chronotype assessment by incorporating the information on timing of sleep and wakefulness for both work and free days. The timing and duration of sleep are generally independent. However, when the two are analysed separately for work and free days, sleep duration strongly depends on chronotype. In addition, chronotype is both age- and sex-dependent.

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  1. Toh KL, Jones CR, He Y, Eide EJ, Hinz WA, Virshup DM, et al. An hPer2 phosphorylation site mutation in familial advanced sleep phase syndrome. Science 2001;291(5506):1040-3.
  2. Putilov A. Association of the circadian phase with two morningness-eveningness scales of an enlarged version of the sleep-wake pattern assessment questionnaire. Arbeits- wiss Betriebl Praxis 2000;17:317-22.
  3. Roenneberg T, Tan Y, Dragovic Z, Ricken J, Kuehnle T, Merrow M. Chronoecology from fungi to humans. In: Honma K, Honma S, editors. Biological rhythms. Sapporo: Hokkaido University Press; 2005. p. 73-90. Ã

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Authors
Roenneberg, T., Kuehnle, T., Juda, M., Kantermann, T., Allebrandt, K., Gordijn, M., & Merrow, M.
Affiliations
  • Institut für Medizinische Psychologie (DE)
  • University of Groningen (NL)
Corresponding author
Roenneberg, Till
Venue
Sleep Medicine Reviews
Publisher
Elsevier BV
Published
2007-12
Volume
11
Issue
6
Pages
429-438
ISSN
1087-0792 (ISSN-L)
OpenAlex
W2171931117
Cited by
1,545
References
44
Citations by year
2026: 101 · 2025: 116 · 2024: 110 · 2023: 116 · 2022: 112 · 2021: 125 · 2020: 116 · 2019: 117 · 2018: 95 · 2017: 93 · 2016: 73 · 2015: 80 · 2014: 63 · 2013: 68 · 2012: 54
FWCI
1.93
Type
journal article
Language
en
Open access
Locations
  • Sleep Medicine Reviews (publishedVersion)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, other-oa)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
circadian clock, chronotype, Munich Chronotype Questionnaire, sleep timing, sleep duration, actigraphy, questionnaire validation, age and sex differences, interindividual variability
MeSH terms
Adolescent, Adult, Algorithms, Biological Clocks, Child, Circadian Rhythm, Female, Humans, Male, Population Surveillance, Psychometrics, Surveys and Questionnaires, Reference Values, Sex Factors, Sleep, Wakefulness, Age Distribution, Sex Distribution, Sleep Disorders, Circadian Rhythm

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