Affiliations: Department of Ergonomics, School of Public Health and
Research Center for Health Sciences, Hamadan University of Medical Sciences,
Hamadan, Iran | Department of Health, Safety and Environment, National
Iranian Oil Production and Distribution Company, Ministry of Oil, Tehran, Iran | Department of Occupational Health, School of Public
Health and Research Center for Health Sciences, Hamadan University of Medical
Sciences, Hamadan, Iran | Department of Biostatistics, School of Public Health
and Research Center for Health Sciences, Hamadan University of Medical
Sciences, Iran
Note: [] Address for correspondence: Majid Motamedzade, Department of
Ergonomics, School of Public Health and Research Center for Health Sciences,
Hamadan University of Medical Sciences, Hamadan, Iran. Tel.: +98 (811) 8255963;
Fax: +98 (811) 8255301; E-mail: [email protected]
Abstract: Objective: The primary goal of this study was to use the Strain
Index (SI) to assess the risk of developing upper extremity musculoskeletal
disorders in a television (TV) manufacturing industry and evaluate the
effectiveness of an educational intervention. Methods: The project was
designed and implemented in two stages. In first stage, the SI score was
calculated and the Nordic Musculoskeletal Questionnaire (NMQ) was completed.
Following this, hazardous jobs were identified and existing risk factors in
these jobs were studied. Based on these data, an educational intervention was
designed and implemented. In the second stage, three months after implementing
the interventions, the SI score was re-calculated and the Nordic
Musculoskeletal Questionnaire (NMQ) completed again. Participants: 80 assembly workers of an Iranian TV manufacturing industry were randomly selected
using simple random sampling approach. Results: The results showed that
the SI score had a good correlation with the symptoms of musculoskeletal
disorders. It was also observed that the difference between prevalence of signs
and symptoms of musculoskeletal disorders, before and after intervention, was
significantly reduced. Conclusions: A well conducted implementation of an
interventional program with total participation of all stakeholders can lead to
a decrease in musculoskeletal disorders.
Keywords: Musculoskeletal disorders, strain index, assembly work
