Show simple item record

dc.contributor.authorGroß, J.
dc.contributor.authorFritschi, Lin
dc.contributor.authorErren, T.
dc.identifier.citationGroß, J. and Fritschi, L. and Erren, T. 2017. Hypothesis: A perfect day conveys internal time. Medical Hypotheses. 101: pp. 85-89.

© 2017 Elsevier LtdIn 2007 the International Agency for Research on Cancer [IARC] concluded “shift work that involves circadian disruption is probably carcinogenic to humans” (Group 2A). To investigate the “probable” causal link, information on individual chronobiology is needed to specify exposures to circadian disruption associated with shift work. In epidemiological studies this information is usually assessed by questionnaire. The most widely used Morningness-Eveningness-Questionnaire (MEQ) and MunichChronoTypeQuestionnaire (MCTQ) reveal information on circadian type (MEQ) and actual sleep behaviour (MCTQ). As a further option we suggest to obtain preferred sleep times by using what we call the perfect day (PD) approach. We hypothesize that a PD – as a day of completely preferred sleep behaviour – captures pristine internal time. We argue that the PD approach may measure internal time more accurately than the MEQ and MCTQ which convey influences by work and social time pressures. The PD approach may therefore reduce misclassifications of internal time and reveal circadian disruption caused by different shift systems.

dc.publisherChurchill Livingstone
dc.titleHypothesis: A perfect day conveys internal time
dc.typeJournal Article
dcterms.source.titleMedical Hypotheses
curtin.departmentEpidemiology and Biostatistics
curtin.accessStatusFulltext not available

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record