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The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
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Updated: May 8, 2025

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Sleep disorders among Tunisian night-shift workers: a cross-sectional study.

Rim Khemakhem1, Nesrine Kammoun2, Sirine Fehri3

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Night shift work significantly impacts Tunisian workers

Keywords:
Night shift workOccupational healthSleep disordersSleep–wake cycleTunisian workers

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Area of Science:

  • Occupational Health
  • Sleep Medicine
  • Circadian Biology

Background:

  • Night shift work is prevalent and disrupts natural circadian rhythms.
  • Disrupted circadian rhythms are linked to various health concerns.
  • Understanding these impacts is crucial for worker well-being.

Purpose of the Study:

  • To examine the effects of night shifts on sleep quality in Tunisian workers.
  • To determine the prevalence of sleep disorders among this population.
  • To identify factors contributing to poor sleep quality.

Main Methods:

  • A cross-sectional study involving 503 Tunisian night shift workers (aged 25-64).
  • Online questionnaires assessed sleep quality (PSQI), insomnia (ISI), daytime sleepiness (ESS), depression (PHQ-9), and well-being (WHO-5).
  • Validated Arabic versions of assessment tools were utilized.

Main Results:

  • 59.4% of workers reported poor sleep quality (PSQI > 5).
  • 13.7% experienced insomnia (ISI > 15), with 2% severe.
  • Factors associated with poor sleep included BMI, smoking, diet, medication use, and specific health conditions.

Conclusions:

  • Night shift work substantially impairs sleep quality and well-being in Tunisian workers.
  • Interventions should focus on shift scheduling, workplace wellness, lifestyle, and mental health support.
  • Further research is needed on shift work, sleep, and mental health interrelationships.