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Clinical Trials/NCT07702344
NCT07702344RecruitingNot Applicable

Investigation of Circadian Rhythm, Musculoskeletal Pain, Sleep Quality, and Quality of Life Among Heavy Industry Shift Workers: A Cross-Sectional Study

Istanbul Gedik University1 site in 1 country220 target enrollmentStarted: July 20, 2026Last updated:
Conditions
Interventions

Trial Snapshot

Phase
Not Applicable
Status
Recruiting
Sponsor
Enrollment
220
Locations
1
Primary Endpoint
Morningness-Eveningness Questionnaire (MEQ)

Study Overview

Brief Summary

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 Design

Study Type
Observational
Observational Model
Other
Time Perspective
Cross Sectional

Eligibility Criteria

Ages
18 Years to 65 Years (Adult, Older Adult)
Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Ages 18-65
  • Working in a shift system for at least 3 months
  • Agreeing to participate in the work voluntarily
  • Being a shift worker

Exclusion Criteria

  • Presence of using any medication that may affect alertness or muscle activity

Arms & Interventions

Heavy Industry Shift Workers

Heavy industry workers who perform shift work and will undergo a single questionnaire-based assessment.

Intervention: Questionnaire-Based Assessment (Other)

Outcomes

Primary Outcomes

Morningness-Eveningness Questionnaire (MEQ)

Time Frame: At enrollment (single assessment)

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.

Secondary Outcomes

  • Pittsburgh Sleep Quality Index (PSQI)(At enrollment (single assessment))
  • Cornell Musculoskeletal Discomfort Questionnaire (CMDQ)(At enrollment (single assessment))
  • World Health Organization Quality of Life-BREF (WHOQOL-BREF)(At enrollment (single assessment))

Investigators

Sponsor
Istanbul Gedik University
Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

Amine Ataç

Asst. Prof.

Istanbul Gedik University

Study Sites (1)

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