Research code: 186/p9/1403
Ethics code: IR.ESFARAYENUMS.REC.1403.017
Ahmad Mehri1 
, Seyed Hojat Mousavi Kordmiri *2 , Ali Ansari Moghadam3 , , Fatemeh Sadat Dolatabadi3 , Donya Mostaghimi4
, Seyed Hojat Mousavi Kordmiri *2 , Ali Ansari Moghadam3 , , Fatemeh Sadat Dolatabadi3 , Donya Mostaghimi4
1- Ilam University of Medical Sciences
2- Esfarayen Faculty of Medical Sciences ,hojatmk66@yahoo.com
3- Esfarayen Faculty of Medical Sciences
4- Hamadan University of Medical Sciences
2- Esfarayen Faculty of Medical Sciences ,
3- Esfarayen Faculty of Medical Sciences
4- Hamadan University of Medical Sciences
Abstract: (62 Views)
Background and Objective: Musculoskeletal disorders (MSDs) are among the most common occupational health problems, with whole-body vibration (WBV) recognized as a significant contributing factor. This study aimed to investigate the relationship between WBV exposure and musculoskeletal discomfort among operators of construction machinery.
Materials and Methods: In this cross-sectional study, 150 construction machinery operators were evaluated. The Cornell Musculoskeletal Discomfort Questionnaire (CMDQ) was used to assess discomfort levels, and WBV was measured using the SV106D device in accordance with ISO 2631 standards. The data were analyzed using descriptive statistics, Pearson correlation, and multiple regression tests.
Results: The mean vibration acceleration was 0.54 ± 0.37 m/s², which was below the national 8-hour exposure limit. Nevertheless, 65.3% of participants reported moderate discomfort and 2% reported severe discomfort. The neck, lower back, and shoulders showed the highest levels of discomfort. A positive and significant correlation was observed between musculoskeletal discomfort scores and whole-body vibration (r = 0.521, p < 0.001), work experience (r = 0.410, p < 0.001), and age (r = 0.271, p = 0.001). In the multiple regression model, whole-body vibration alone predicted 27.8% of the variance in musculoskeletal discomfort scores, which increased to 42% after adding work experience and age.
Conclusion: Even exposure to WBV below permissible limits, if prolonged and under poor ergonomic conditions, can lead to considerable musculoskeletal discomfort.
Materials and Methods: In this cross-sectional study, 150 construction machinery operators were evaluated. The Cornell Musculoskeletal Discomfort Questionnaire (CMDQ) was used to assess discomfort levels, and WBV was measured using the SV106D device in accordance with ISO 2631 standards. The data were analyzed using descriptive statistics, Pearson correlation, and multiple regression tests.
Results: The mean vibration acceleration was 0.54 ± 0.37 m/s², which was below the national 8-hour exposure limit. Nevertheless, 65.3% of participants reported moderate discomfort and 2% reported severe discomfort. The neck, lower back, and shoulders showed the highest levels of discomfort. A positive and significant correlation was observed between musculoskeletal discomfort scores and whole-body vibration (r = 0.521, p < 0.001), work experience (r = 0.410, p < 0.001), and age (r = 0.271, p = 0.001). In the multiple regression model, whole-body vibration alone predicted 27.8% of the variance in musculoskeletal discomfort scores, which increased to 42% after adding work experience and age.
Conclusion: Even exposure to WBV below permissible limits, if prolonged and under poor ergonomic conditions, can lead to considerable musculoskeletal discomfort.
Article number: 5
Type of Study: Research Article |
Subject:
Physical agents
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