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The Effects of Circadian Rhythm Disruption on Mental Health and Physiological Responses among Shift Workers and General Population

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  • Mahadir Ahmad

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Nur Syafiqa Balqis Md. Din

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Ruthra Devi Tharumalay

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Normah Che Din

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Norhayati Ibrahim

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Noh Amit

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Nor MF Farah

    (Research Center for Community Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

  • Rose Azzlinda Osman

    (Respiratory Unit, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaacob Latif, Bandar Tun Razak, Kuala Lumpur 56000, Malaysia)

  • Mohamed Faisal Abdul Hamid

    (Respiratory Unit, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaacob Latif, Bandar Tun Razak, Kuala Lumpur 56000, Malaysia)

  • Ibnor Azli Ibrahim

    (Faculty of Sharia and Law, Universiti Islam Sultan Sharif Ali, Simpang 347, Jalan Pasar Gadong BE 1310, Brunei)

  • Ezad Azraai Jamsari

    (Research Centre for Arabic Language and Islamic Civilization, Faculty of Islamic Studies, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia)

  • Mohd Rizal Palil

    (Faculty of Economics and Management, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia)

  • Sha’ari Ahmad

    (Program of Clinical Psychology & Behavioral Health, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia)

Abstract

Background : The effect of circadian disruption on the bio-psychological clock system has been widely studied. However, the mechanism and the association of circadian rhythm disruption with mental health and physiological responses are still unclear. Therefore, this study was conducted to investigate the effects of circadian rhythm disruption on mental health and physiological responses among shift workers and the general population. Methods : A total of 42 subjects participated in this quasi-experimental study. Participants were divided into a group of shift workers ( n = 20) and a general population group ( n = 22). Polysomnography tests, blood tests (cortisol, triglycerides and glucose), and psychological tests (Abbreviated Profile of Mood States, General Health Questionnaire-28, Working Memory and Processing Speed Indexes of the Wechsler Adult Intelligent Scale (WAIS-IV) were used to examine the effects of circadian rhythm disruption. Results : The results showed a significant relationship between circadian rhythm disruption and mood ( r = 0.305, p < 0.05). The findings of this study also indicated that there was a significant effect of circadian rhythm disruption on mood (F(2,40) = 8.89, p < 0.001, η 2 =0.182), processing speed (F(2,40) = 9.17, p < 0.001, η 2 = 0.186) and working memory (F(2,40) = 4.963, p < 0.01, η 2 = 0.11) in shift workers and the general population. Conclusions : Our findings showed that circadian rhythm disruption affects mood and cognitive performance, but it does not significantly affect psychological wellbeing and physiological responses. Future studies are warranted to examine moderator and mediator variables that could influence the circadian rhythm disruption.

Suggested Citation

  • Mahadir Ahmad & Nur Syafiqa Balqis Md. Din & Ruthra Devi Tharumalay & Normah Che Din & Norhayati Ibrahim & Noh Amit & Nor MF Farah & Rose Azzlinda Osman & Mohamed Faisal Abdul Hamid & Ibnor Azli Ibrah, 2020. "The Effects of Circadian Rhythm Disruption on Mental Health and Physiological Responses among Shift Workers and General Population," IJERPH, MDPI, vol. 17(19), pages 1-16, September.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:19:p:7156-:d:421800
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    References listed on IDEAS

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    1. Guozhong Zheng & Ke Li & Wentao Bu & Yajing Wang, 2019. "The Effects of Indoor High Temperature on Circadian Rhythms of Human Work Efficiency," IJERPH, MDPI, vol. 16(5), pages 1-17, March.
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    1. Fatin Hanani Mazri & Zahara Abdul Manaf & Suzana Shahar & Arimi Fitri Mat Ludin & Siti Munirah Abdul Basir, 2022. "Development and Evaluation of Integrated Chrono-Nutrition Weight Reduction Program among Overweight/Obese with Morning and Evening Chronotypes," IJERPH, MDPI, vol. 19(8), pages 1-20, April.

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