Universität zu Köln

Gross, J. V., Fritschi, L. and Erren, T. C. (2017). Hypothesis: A perfect day conveys internal time. Med. Hypotheses, 101. S. 85 - 90. EDINBURGH: CHURCHILL LIVINGSTONE. ISSN 1532-2777

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Abstract

In 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. (C) 2017 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gross, J. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fritschi, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Erren, T. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-235138
DOI:	10.1016/j.mehy.2017.02.010
Journal or Publication Title:	Med. Hypotheses
Volume:	101
Page Range:	S. 85 - 90
Date:	2017
Publisher:	CHURCHILL LIVINGSTONE
Place of Publication:	EDINBURGH
ISSN:	1532-2777
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MUNICH CHRONOTYPE QUESTIONNAIRE; SLEEP PHASE SYNDROME; CHRONODISRUPTION Multiple languages Medicine, Research & Experimental Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23513