Sleep Quality and Life Satisfaction of Railway Employees

Miodrag Milenović; Nebojša Milićević; Mina Dimitrijević

doi:10.5937/zrffp51-31311

Miodrag B. Milenović University of Niš, Faculty of Philosophy, Department of Psichology, Psychology Research Laboratory https://orcid.org/0000-0003-1984-0088
Nebojša M. Milićević University of Niš, Faculty of Philosophy, Department of Psichology, Psychology Research Laboratory https://orcid.org/0000-0003-3289-3088
MIna P. Dimitrijević Hermods SFI, Göteborg, Sweden

DOI: https://doi.org/10.5937/zrffp51-31311

Keywords: quality of sleep, life satisfaction, railway employees

Abstract

The aim of the study was to examine the relationship between sleep quality and life satisfaction. The basic hypothesis was that the dimensions of quality and quantity of sleep will be statistically significant predictors of life satisfaction among employees of the Serbian Railways. A total of 126 workers working in different jobs were surveyed: dispatcher, information worker, cashier, train driver, and conductor. Respondents differed according to gender, age, and years of service. The main research variables were operationalized by The Pittsburgh Sleep Quality Index (PSQI; Buysse et al., 1989) and the Satisfaction Life Scale (SWLS; Diener et al., 1985). The results showed that based on the regression model consisting of sleep quality modalities, the criterion variable – life satisfaction (R² = .40, p <0.01) can be statistically significantly explained. The largest individual contribution to the prediction of the criterion variable has the predictor of dysfunction during the day (β = -. 42, p <0.01), followed by sleep disorders (β = -. 22, p <0.05) and sleep duration (β = -. 22, p < 0.01). Examination of differences with respect to some sociodemographic variables showed that women show poorer quality of sleep, and that the quality of sleep decreases with age, that more sleep disorders occur, which causes dysfunctions during the day and more frequent use of medications.

Author Biography

Nebojša M. Milićević, University of Niš, Faculty of Philosophy, Department of Psichology, Psychology Research Laboratory

Departman za psihologiju, docent

References

Arber, S., Bote, M., Meadows, R. (2009). Gender and socio-economic patterning of self-reported sleep problems in Britain. Soc Sci Med, 68, 281–289.

Arslan, C., Hamarta, E., Uslu, M. (2010). The relationship between conflict communication, self-esteem and life satisfaction in university students. Educational Research and Reviews, 5 (1), 31–34.

Baehr, E. K., Fogg, L. F., Eastman, Ch. I. (1999) Intermittent bright light and exercise to entrain human circadian rhythms to night work. Regulatory and integrative physiology, 277 (6), 1598–1604. https://doi.org/10.1152/аjpregu.1999.277.6.R1598

Branton, P. (1979). Investigations into the skills of train-driving. Ergonomics, 22 (2), 155–164.

Bixler, E. O, Kales, A., Soldatos, C. R., Kales, J. D., Healey, S. (1979). Prevalence of sleep disorders in the Los Angeles metropolitan area. The American Journal of Psychiatry, 136 (10), 1257–1262. https://doi.org/10.1176/ajp.136.10.1257

Buysse, D. J., Reynolds, C. F., Monk, T. H., Berman, S. R., Kupfer, D. J. (1989). The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice and research. Psychiatry research, 28 (2), 193–213.

Cavallera, G. M. & Giudici, S. (2008). Morningness and eveningness personality: A survey in literature from 1995 up till 2006. Personality and Individual differences, 44 (1), 3–21.

Diener, E. & Diener, M. (2009). Cross-cultural correlates of life satisfaction and self-esteem. In: Culture and well-being (71–91). Springer Netherlands.

Diener, E. (2000). Subjective well-being: The science of happiness and a proposal for a national index. American psychologist, 55 (1), 34.

Diener, E., Emmons, R. A., Larsen, R. J., Griffin, S. (1985). The Satisfaction With Life Scale. Journal of Personality Assessment, 49, 71–75.

Diener, L., Oishi, S., Lucas, R. E. (2003). Personality, culture, and subjective well-being: Emotional and cognitive evaluations of life. Annual Review of Psychology, 54, 403–425.

Farbos, B., Bourgeois-Bougrine, S., Cabon, P., Mollard, R., Coblentz, A. (2000). Sleepiness during night-shift–sleeping habits or melatonin rhythm? A laboratory study. International journal of industrial ergonomics, 25 (3), 283–294.

Hak, A. & Kampman, R. (1981). Working irregular hours: Complaints and state of fitness of railway personnel. In: A. Reinberg, N. Vieux, P. Andlauer (Eds.), Night and Shift Work: Biological and Social Aspects (229–236). Pergamon Press, Oxford.

Härmä, M., Sallinen, M., Ranta, R., Mutanen, P., Müller, K. (2002). The effect of an irregular shift system on sleepiness at work in train drivers and railway traffic controllers. Journal of sleep research, 11 (2), 141–151.

Horne, J. A. & Ostberg, O. (1976). A self-assessment questionnaire to determine morningness-eveningness. Human circadian rhythms. International journal of chronobiology, 4 (2), 97–110.

Ingre, M., Söderström, M., Kecklund, G., Åkerstedt, T., Kecklund, L. (2000) Train drivers work situation. Working hours, sleep, stress and safety. Stress Research Report no. 292. Institutet för Psykosocial Medicine (IPM), Stockholm.

Landry, G. J., Best, J. R., Liu-Ambrose, T. (2015). Measuring sleep quality in older adults: a comparison using subjective and objective methods. Frontiers in aging neuroscience, 7, 166. https://doi.org/10.3389/fnagi.2015.00166

Lindberg, E., Janson, C., Gislason, T., Bjornsson, E., Hetta, J., Boman, G. (1997). Sleep disturbances in a young adult population: can gender differences be explained by differences in psychological status? Sleep, 20, 381–387.

Lucas, R. E. & Diener, E. (2010). Subjective well-being. In: M. Lewis, J. M. Haviland-Jones, L. Feldman Barrett (Eds.), Handbook of emotions (471–484). New York: The Guilford Press.

Middelkoop, H. A. M., Smilde-van den Doel, D. A., Knuistingh Neven, A., A. C. Kamphuisen, H. A .C., Springer, C. P. (1996). Subjective Sleep Characteristics of 1,485 Males and Females Aged 50–93: Effects of Sex and Age, and Factors Related to Self-Evaluated Quality of Sleep. The Journals of Gerontology: Series A, 51, (3), 108–115.

Pavot, W. G. & Diener, E. (1993). Review of the Satisfaction With Life Scale. Psychological Assessment, 5, 164–172.

Petz, B. & Vidaček, S. (2000). Istraživanja psihofizioloških i temporalnih uvjeta rada. Arhiv za higijenu rada i toksikologiju, 50 (4), 405–421

Penezić, Z. (2006). Zadovoljstvo životom u adolescentnoj i odrasloj dobi. Društvena istraživanja, 15 (4–5), 643–669.

Takeyama, H., Itani, T., Tachi, N., Sakamura, O., Suzumura, H. (2002). Psycho-physiological effects of naps during night shifts on morning types and evening types. Journal of Occupational Health, 44 (2), 89–98.

Torsvall, L., Åkerstedt, T., Gillberg, M. (1981). Age, sleep and irregular workhours: a field study with electroencephalographic recordings, catecholamine excretion and self-ratings. Scandinavian journal of work, environment & health, 7, 196–203.

Zhang, B. & Wing, Y. K. (2006). Sex differences in insomnia: a meta-analysis. Sleep, 29, 85–93.