Abstract
Östberg, O. (1973).British Journal of Industrial Medicine,30, 341-351. Interindividual differences in circadian fatigue patterns of shift workers. Data from 37 computer operators and output-handlers, working on discontinuous 8-16-24 alternating shifts, were collected in the morning, evening, and night shifts during a one-year period. The study was directed to the interindividual differences in the workers' circadian patterns of activity, sleep, oral temperature, time estimation, physical fitness, and food intake. By means of a questionnaire on preferences and habits of activity and time of day, three subgroups of five subjects each were selected—`morning', `middle', and `evening' groups. Significant differences were found between the groups and between the shifts. Most interesting was the significant interaction of group × shift, on the basis of which it could be concluded that the `morning' type of subjects had the most pronounced difficulty in adapting to the shift system practised. It is thought that a refinement of the questionnaire used should eventually result in a tool for assessing a person's circadian type and the interaction of type × shift.
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Selected References
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- Ostberg O. Circadian rhythms of food intake and oral temperature in "morning" and "evening" groups of individuals. Ergonomics. 1973 Mar;16(2):203–209. doi: 10.1080/00140137308924497. [DOI] [PubMed] [Google Scholar]
- Pfaff D. Effects of temperature and time of day on time judgments. J Exp Psychol. 1968 Mar;76(3):419–422. doi: 10.1037/h0025481. [DOI] [PubMed] [Google Scholar]
- Pátkai P. The diurnal rhythm of adrenaline secretion in subjects with different working habits. Acta Physiol Scand. 1971 Jan;81(1):30–34. doi: 10.1111/j.1748-1716.1971.tb04874.x. [DOI] [PubMed] [Google Scholar]
- THIIS-EVENSEN E. Shift work and health. Ind Med Surg. 1958 Oct;27(10):493–497. [PubMed] [Google Scholar]
- THOR D. H. Diurnal variability in time estimation. Percept Mot Skills. 1962 Oct;15:451–454. doi: 10.2466/pms.1962.15.2.451. [DOI] [PubMed] [Google Scholar]
- Tune G. S. Sleep and wakefulness in normal human adults. Br Med J. 1968 May 4;2(5600):269–271. doi: 10.1136/bmj.2.5600.269. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Voigt E. D., Engel P., Klein H. Uber den Tagesgang der körperlichen Leistungsfähigkeit. Int Z Angew Physiol. 1968;25(1):1–12. [PubMed] [Google Scholar]