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Comparison of the Risk of Musculoskeletal Disorders among Normal and Students with Hearing Abnormalities in Ilam City
Iraj Alimohammadi, Shahram Vosoughi, Jamileh Abolghasemi, Athena Rafieepour, Seyed Hosein Tabatabaei, Batool Delshadi,
Volume 10, Issue 2 (Iranian Journal of Ergonomics 2022)
Abstract
Objectives: Inappropriate sitting posture on bench can contribute to pain and musculoskeletal disorders in students. Hearing and vision disabilities may be the cause of inappropriate sitting postures among students. Therefore, the aim of the present study was to compare the risk of musculoskeletal disorders in normal and students with hearing abnormalities in Ilam city.
Methods: Twenty students with hearing abnormalities (case) and 40 students with normal hearing (control) from primary schools in Ilam city of both genders were randomly included in the study. The worst recorded sitting posture of students on the bench was evaluated by the RULA method. Digimizer software was used to survey the body angles of the students while sitting on the bench. The used for analyzing the obtained data in 95% confidence interval.
Results: The results of posture evaluation showed that there was a significant difference in rula scores between case and control groups (P = 0.001). Deviation from the natural angles of the body in the case groups was more than the control group (P < 0.001), which has a direct and significant relationship with the increased risk of musculoskeletal disorders.
Conclusion: Musculoskeletal disorders possibility incidence were more common in students with hearing abnormalities compared to typical students which was due to an increase in deviation from the natural angles of the body and inappropriate postures. Given the limitation of the sample size, the present study recommends further research with the same goal and encourages interventional studies to correct the posture of hard of hearing students.

Association between Quality of Life and Musculoskeletal Disorders among Dentists in Ardabil: A Cross-Sectional Study
Ali Lotfi, Maryam Daneshvar, Mehdi Vosoughi Niri, Parvin Ahmadinezhad, Soheila Derisavy Jorfian, Mohsen Poursadeghiyan,
Volume 14, Issue 2 (Iranian Journal of Ergonomics 2026)
Abstract
* Contributed equally as the corresponding authors.
Objectives: Dentistry, a profession characterized by a static nature, repetitive movements, and occupational stress, is considered a high-risk occupation for the development of musculoskeletal disorders and reduced quality of life. The present research aimed to investigate the relationship between musculoskeletal disorders and quality of life among dentists.
Methods: This descriptive-analytical cross-sectional study was conducted in 2025 on 150 practicing dentists in the city of Ardabil, Iran. The participants were selected through the convenience sampling method. Data were collected using standard questionnaires, including a demographic Information Questionnaire and the Nordic Musculoskeletal Questionnaire (NMQ) for musculoskeletal disorders and the World Health Organization Quality of Life (WHOQOL) questionnaire. Data analysis was performed using SPSS software (version 26) with Chi-square.
Results: The most commonly affected areas were the lower back (64.7%) and neck (60.7%). Reduced professional activity due to these complaints was reported by 28.7% of participants. Overall quality of life was moderate to low, with the environmental health domain showing the lowest score (56.79 out of 100). The Chi-square test showed significant associations between quality of life and musculoskeletal complaints reported over the previous 12 months in the shoulder (p=0.003), elbow (p=0.001), and upper back (p=0.001). Similar significant associations were found for complaints reported over the previous 7 days in the shoulder (p=0.005), elbow (p=0.001), upper back (p=0.001), and lower back (p=0.001).Conclusion: Findings of the present study indicate a high prevalence of musculoskeletal disorders and a moderate level of quality of life among dentists in Ardabil, Iran. Given the significant association observed, greater attention to the occupational health and working conditions of dentists appears to be necessary.

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