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Showing 3 results for Ghahramani
An Assessment of Association Between Macro-ergonomics Status and Employees’ Prevalence of Musculoskeletal Disorders and Job Stress Outcomes in Urmia Educational and Medical Hospitals
Parisa Hassanzadeh, Abolfazl Ghahramani, Iraj Mohebbi,
Volume 7, Issue 4 (Iranian Journal of Ergonomics 2020)
Abstract

Background and Objectives: Macro Ergonomics is a socio-technical approach that deals with organizational, and work system design, as well as the design of human-machine, human-environment, and human-job interactions. Researches show that workplace macroeconomic’ conditions have undesirable effects on employees’ health, and hospital staff experience high levels of occupational stress and high prevalence of musculoskeletal disorders. This study aimed to investigate the relation between macroeconomic’ condition and prevalence of musculoskeletal disorders as well as outcomes of job stress among employees of hospitals affiliated to Urmia University of Medical Sciences.
Methods: This study was a descriptive cross-sectional study and 350 employees who randomly were selected from 5 hospitals participated in this study. Macro-ergonomic, Nordic and job stress outcomes questionnaires were used for data collection. Descriptive statistics, ANOVA and Chi-square tests were applied for data analysis.
Results: The findings of the present study indicated that out of 350 participants 217 (62%) were female and 168 were nurses (48%). Their mean age was 36.63 (±8.13) years and their average work experience was 11.53 (±7.65) years. The results of ANOVA test showed that the status of macro-ergonomics was significantly different in hospitals and hospital 1 had favorable condition. The majority of musculoskeletal disorder symptoms were reported in the neck (75.7%), hip, and waist (73.7%). The average score of job stress outcomes for the participants was lower than favorable limit. Macro-ergonomic’ conditions had significant associations with musculoskeletal disorders and job stress’ outcomes.
Conclusion: Based on the results of the current study, macro-ergonomic conditions had significant effects on musculoskeletal disorders and job stress outcomes. Interventional efforts should focus on organization and developing macro-ergonomic training programs to reduce musculoskeletal disorders and job stress and improve job conditions in hospitals.


Investigating the Association of Noise Exposure with Occupational Stress and Work Ability among Workers of a Food Processing Plant
Rasoul Hemmatjo, Abolfazl Ghahramani, Mansour Mahmood Aghbash,
Volume 12, Issue 4 (Iranian Journal of Ergonomics 2025)
Abstract
Objectives: Numerous factors such as job types and conditions, work organizations, and individual characteristics affect work ability of the workers. Furthermore, occupational stress is not solely influenced by individual characteristics; a stressful work environment is also a significant source of stress. Noise has been recognized as one of the major occupational hazards that adversely affects work condition in many industries. In the present study, the association of noise exposure with occupational stress and work ability of the workers in a food processing plant was investigated.
Methods: This descriptive-analytic study was performed on 142 workers of a food processing plant in various work groups. The OSIPOW questionnaire results were utilized to measure occupational stress and the work ability of the workers was determined by Work Ability Index (WAI) questionnaire. Noise exposure of the workers was calculated as a measure of 8-hour time weighted average. The association between noise exposure and work ability was analyzed using Pearson and Spearman correlation tests. Multiple regression test was utilized to analyze the simultaneous effect of variables. Moreover, one-way analysis of variance (one-way ANOVA) was used to analyze the mean difference of independent variables.
Results: The findings demonstrated a significant positive association between noise exposure and stress level across various work groups (P<0.001). Furthermore, a significant negative relationship can be found between noise exposure and work ability of the workers (P<0.001). A simultaneous analysis of variables influencing occupational stress and WAI showed that noise had the most effect. Although  occupational stress levels were not significantly different across working groups, mean difference of WAI was significant.
Conclusion: Based on the obtained findings, higher levels of noise exposure may contribute to increased occupational stress and decreased work ability among workers.

Evaluation of Luminance and Illuminance and Their Relationship with Visual Fatigue among Users of Video Terminals at Tabriz University of Medical Sciences in 2024
Zahra Sadat Sharifi, Abolfazl Ghahramani, Rasoul Hemmatjoo,
Volume 13, Issue 3 (Iranian Journal of Ergonomics 2025)
Abstract
Objectives: Nowadays, electronic devices, such as computers, mobile phones, and tablets, have played a crucial role in people's work and lives. The main complaint of users of video terminals is eye symptoms caused by prolonged use. This study aimed to evaluate the intensity of luminance and illuminance and their possible relationship with visual fatigue in users of video terminals at Tabriz University of Medical Sciences.
Methods: This cross-sectional study included 171 users of video terminals at Tabriz University of Medical Sciences. In this study, the local illuminance intensity at the work surface and the luminance intensity from the screen at the user's eye level were measured. A 15-question visual fatigue questionnaire was used to assess visual fatigue. The results were analyzed using paired t-tests and chi-square tests using SPSS software (version.16).
Results: In this study, the average local illumination intensity on the desk was 306.6 lux, and the average luminance intensity was 73.9 cd/m2. The local illumination intensity was lower than the recommended level in 41.6% of the cases. No statistically significant relationship was observed between illumination intensity and users' visual fatigue during the study, nor between users' luminance and visual fatigue. The results of this study showed that visual fatigue at the end of the work significantly correlates with an individual's visual fatigue at the beginning of the work. The results of this study also showed a significant relationship between visual fatigue and the type of work.
Conclusion: The results of this study showed no relationship between luminance and illuminance intensity and visual fatigue. According to the findings of this study, it is recommended that, if possible, the time to start working with visual terminals should be when there is no feeling of visual fatigue. Also, since one of the factors affecting visual fatigue is the type of work, it is recommended that users manage their job in such a way that they are mostly inactive (reading the page).

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