Bimodal chronotype in night-shift workers
https://doi.org/10.31089/1026-9428-2018-12-59-63
Abstract
Introduction. Typology of diurnal (circadian) human rhythms is actively studied in occupational medicine, from the viewpoint of adaptation to various work conditions including those with shift working schedule. In recent years, evidences outline bimodal chronotype characterized by simultaneously present signs of extreme morning and extreme evening types without dominating one of them. Studies did not cover bimodal chronotype in night-shift workers.
Objective is to evaluate presence of bimodal chronotype in night-shift workers if compared to day-shift schedule.
Materials and methods. Chronotype outlining covered 95 workers divided into 2 groups: first — 55 night-shift workers, second — 40 workers on day schedule. Bimodal chronotype was diagnosed via algorithm based on questionnaire Morningness Eveningness Questionnaire (MEQ) by B.J. Martynhak et al.
Results. Findings are that 7.3% of night-shift workers and 5.0% of workers with day schedule demonstrate bimodal chronotype. Changed chronotype classification leads to smaller share of workers with intermediate chronotype, but quota of morning and evening chronotypes does not change. Possibility of bimodal chronotype should be respected in examination of workers for designing health programs with consideration of chronotype-associated diseases and for better performance due to rational management of working time.
Conclusions. Diagnosis of individual chronotype is a serious part in health programs formation in able-bodied population. Chronotype knowledge helps to minimize possible decrease and losses of performance due to rational working time management and preventive programs aimed to diagnose chronotype-associated health disorders.
About the Authors
Svetlana G. Gorokhova
Russian Medical Academy of Continuous Professional Education
Russian Federation
2 (1)/1, Barrikadnaya str., Moscow, 125993
Russian Federation
2 (1)/1, Barrikadnaya str., Moscow, 125993
Oleg Yu. Atkov
Russian Medical Academy of Continuous Professional Education
Russian Federation
Russian Federation
Head of Department occupational pathology and medicine, MD, PhD, DSc
2 (1)/1, Barrikadnaya str., Moscow, 125993
Vasiliy V. Serikov
Research Clinical Center of “JSC Russian Railways”
Russian Federation
20, Chasovaya str., Moscow, 125315
Russian Federation
20, Chasovaya str., Moscow, 125315
Elena V. Muraseeva
Research Clinical Center of “JSC Russian Railways”
Russian Federation
20, Chasovaya str., Moscow, 125315
Russian Federation
20, Chasovaya str., Moscow, 125315
Viktor F. Pfaf
Russian Medical Academy of Continuous Professional Education; Izmerov Research Institute of Occupational Health
Russian Federation
2 (1)/1, Barrikadnaya str., Moscow, 125993; 31, Budennogo Ave., Moscow, 105275
Russian Federation
2 (1)/1, Barrikadnaya str., Moscow, 125993; 31, Budennogo Ave., Moscow, 105275
References
1. Tsfasman A.Z. Clinical biorhythmology. Moscow: Izd-vo «Reprotsentr M»; 2010 (in Russian)
2. Iushkova O.I., Matiukhin V.V., Poroshenko A.S., Kapustina A.V., Kalinina S.A. Features of fatigue formation in operators with various types of biorhythmologic activity. Vestnik TvGU. Seriia «Biologiia i ekologiia». 2012; 26 (16): 39–52 (in Russian).
3. Aho V., Ollila H.M., Kronholm E., Bondia-Pons I. et al. Prolonged sleep restriction induces changes in pathways involved in cholesterol metabolism and inflammatory responses. Sci Rep. 2016; 6: 24828.
4. Adan A., Archer S.N., Hidalgo M.P., Di Milia L., Natale V., Randler C. Circadian Typology: A Comprehensive Review. Chronobiology International. 2012; 29 (9): 1153–75.
5. Basnet S, Merikanto I, Lahti T, Männistö S, Laatikainen T., Vartiainen E, Partonen T. Associations of common noncommunicable medical conditions and chronic diseases with chronotype in a population-based health examination study. Chronobiology International. 2017; 34 (4): 462–70.
6. Horne JA, Ostberg O. A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms. Chronobiology International. 1976; 4 (2): 97–110.
7. Horzum M.B., Randler C., Masal E., Beşoluk Ş., Önder İ., Vollmer C. Morningness-eveningness and the environment hypothesis — A cross-cultural comparison of Turkish and German adolescents. Chronobiology International. 2015; 32 (6): 814–21.
8. Groeger J.A., Zijlstra F.R., Dijk D.J. Sleep quantity, sleep difficulties and their perceived consequences in a representative sample of some 2000 British adults. J. Sleep Res. 2004; 13: 359–71.
9. Jones S.E., Tyrrell J., Wood A.R., Beaumont R.N., Ruth K.S., Tuke M.A., Yaghootkar H,. Hu Y, Teder-Laving M., Hayward C. et al. Genome-Wide Association Analyses in 128,266 individuals identifi es new morningness and sleep duration loci. PLoS Genet. 2016; 12: e1006125.
10. Juda M, Vetter C, Roenneberg T. Th e Munich Chronotype Questionnaire for Shift-Workers (MCTQShift). J Biol Rhythms. 2013; 28: 130–40.
11. Kantermann T, Eastman CI. Circadian phase, circadian period and chronotype are reproducible over months. Chronobiology International. 2018; 35 (2): 280–8.
12. Martynhak BJ, Louzada FM, Pedrazzoli M, Araujo JF. Does the chronotype classifi cation need to be updated? Preliminary findings. Chronobiol Int. 2010; 27(6): 1329–34.
13. Merikanto I, Lahti T, Puolijoki H, Vanhala M, Peltonen M, Laatikainen T, Vartiainen E, Salomaa V, Kronholm E, Partonen T. Аssociations of Chronotype and Sleep With Cardiovascular Diseases and Type 2 Diabetes. Chronobiology International. 2013; 30 (4): 470–7.
14. Randler C, Vollmer C. Epidemiological evidence for the bimodal chronotype using the composite scale of morningness. Chronobiology International. 2012; 29: 1–4.
15. Tempaku P.F., Ramirez Arruda J., Mazzott i D.R., Gonçalves B.S.B., Pedrazzoli Neto M., Bittencourt L.R.A., Tufik S. Characterization of bimodal chronotype and its association with sleep: A population-based study. Chronobiology International. 2017; 34 (4): 504–10.
16.
Review
For citations:
Gorokhova S.G., Atkov O.Yu., Serikov V.V., Muraseeva E.V., Pfaf V.F. Bimodal chronotype in night-shift workers. Russian Journal of Occupational Health and Industrial Ecology. 2018;(12):59-63. (In Russ.) https://doi.org/10.31089/1026-9428-2018-12-59-63
Views:
717
Email this article 
