Shift work can disrupt the body's circadian rhythm, which may negatively affect sleep, musculoskeletal health, and quality of life. Heavy industry workers who perform rotating or night shifts may be particularly vulnerable to these health problems. This cross-sectional observational study will evaluate circadian rhythm characteristics, musculoskeletal pain, sleep quality, and quality of life among heavy industry shift workers. Participants will complete validated questionnaires assessing chronotype, musculoskeletal symptoms, sleep quality, and quality of life. The study will examine the associations between chronotype and these health outcomes and compare the results across different chronotype groups. The findings may contribute to a better understanding of the health effects of shift work and support the development of occupational health strategies for shift workers
Study Type
OBSERVATIONAL
Enrollment
220
Participants will complete validated self-administered questionnaires to assess chronotype, musculoskeletal pain, sleep quality, and quality of life. No therapeutic intervention will be administered.
Istanbul Gedik University
Istanbul, Turkey (Türkiye)
RECRUITINGMorningness-Eveningness Questionnaire (MEQ)
The Morningness-Eveningness Questionnaire (MEQ) is a validated 19-item self-administered questionnaire used to determine an individual's chronotype (morning, intermediate, or evening type). Total scores range from 16 to 86. Higher scores indicate a greater preference for morningness, whereas lower scores indicate a greater preference for eveningness.
Time frame: At enrollment (single assessment)
Cornell Musculoskeletal Discomfort Questionnaire (CMDQ)
The Cornell Musculoskeletal Discomfort Questionnaire (CMDQ) is a validated self-administered questionnaire used to assess the frequency, severity, and work-related impact of musculoskeletal discomfort in different body regions. The total score is calculated by summing weighted scores across body regions and does not have a fixed minimum or maximum value. Higher scores indicate greater musculoskeletal discomfort.
Time frame: At enrollment (single assessment)
Pittsburgh Sleep Quality Index (PSQI)
The Pittsburgh Sleep Quality Index (PSQI) is a validated self-administered questionnaire used to evaluate sleep quality over the previous month. Total scores range from 0 to 21, with higher scores indicating poorer sleep quality.
Time frame: At enrollment (single assessment)
World Health Organization Quality of Life-BREF (WHOQOL-BREF)
The World Health Organization Quality of Life-BREF (WHOQOL-BREF) is a validated self-administered questionnaire that assesses quality of life across the physical, psychological, social, and environmental domains. Domain scores are transformed to a 0-100 scale, with higher scores indicating better quality of life.
Time frame: At enrollment (single assessment)
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