Assessment of musculoskeletal disorders and mental workload among office workers in the automotive industry

Abstract

Evaluation of workplace ergonomics for office workers is significant for occupational health. Since office employees’ work is often mental, this evaluation should include a mental work-load assessment as well as a physical assessment. The purpose of this study is to examine the physical and mental workload of office workers of an automotive supplier company. This study was carried out on 250 office workers. The musculoskeletal and physical risks were investigated using Rapid Office Strain Assessment (ROSA) and Cornell Musculoskeletal Discomfort Questionnaire (CMDQ), and the mental workload was analyzed with NASA Task Load Index (NASA-TLX). Musculoskeletal disorder risk and mental workload levels were revealed by statistical analysis and examined on the basis of departments. The correlations between risk levels obtained by different methods and the effect of gender and age factors were also investigated. ROSA final score average was 3.69 which corresponds to a moderate risk level. 62.4% of the employees for the chair section and 64.4% of them for the keyboard and mouse section were at moderate and above risk levels. According to the CMDQ results, the body regions with the most discomfort were determined as the neck, upper back, lower back and right wrist. NASA-TLX scores showed that the highest mental workload occurs in office workers in Accounting, Maintenance and Purchasing departments. NASA-TLX scores were found to be correlated with the ROSA final score, but not with the CMDQ scores. Evaluating the musculoskeletal disorder risks and mental workload of office workers together and taking the necessary precautions were beneficial in terms of protecting the health of the employees.

Keywords

• Cornell Musculoskeletal Discomfort Questionnaire (CMDQ)
• Mental Workload
• NASA Task Load Index (NASATLX)
• Office Ergonomics
• Rapid Office Strain Assessment (ROSA)

References

1. REFERENCES
2. [1] Kar G, Hedge A. Effects of a sit-stand-walk intervention on musculoskeletal discomfort, productivity, and perceived physical and mental fatigue, for computer-based work. Int J Ind Ergon 2020;78:102983. [CrossRef]
3. [2] Silverstein B, Evanoff B. Musculoskeletal Disorders. In: Levy BS, Wegman DH, Baron SL et al (ed) Occupational and environmental health: recognizing and preventing disease and injury. Oxford University Press, New York, 2011. p. 335–365.
4. [3] Straker L, Abbott RA, Heiden M, Mathiassen SE, Toomingas A. Sit–stand desks in call centres: Associations of use and ergonomics awareness with sedentary behavior. Appl Ergon 2013;44:517522. [CrossRef]
5. [4] Cho CY, Hwang YS, Cherng RJ. Musculoskeletal symptoms and associated risk factors among office workers with high workload computer use. J Manipulative Physiol Ther 2012;35:534540. [CrossRef]
6. [5] James C, James D, Nie V, Schumacher T, Guest M, Tessier J, Marley J, et al. Musculoskeletal discomfort and use of computers in the university environment. Appl Ergon 2018;69:128135. [CrossRef]
7. [6] Wærsted M, Hanvold TN, Veiersted KB. Computer work and musculoskeletal disorders of the neck and upper extremity: a systematic review. BMC Musculoskelet Disord 2010;11:115. [CrossRef]
8. [7] Sohrabi M, Faridizad AM, Farasati F. Comparing results of musculoskeletal disorders evaluation in computer users with CMDQ, RULA and ROSA methods. J Ilam Uni Med Sci 2015;23:5362.

9. [8] Kahya E. & Erkaplan F. Ergonomic risk assessment with ROSA and Cornell methods in the offices of a large-scale manufacturing enterprise. J Ind Eng 2022;33:469483. [CrossRef]
10. [9] Kahya E. Assessment of musculoskeletal disorders among employees working office workplaces in the manufacturing sector. Work 2021;69:11031113. [CrossRef]
11. [10] Azma K, Nasiri I, Abedi M. The survey of musculoskeletal disorders risk factors among office workers and the implementation of an ergonomic training program. Mil Med 2015;16:211216.
12. [11] Baker R, Coenen P, Howie E, Williamson A, Straker L. The musculoskeletal and cognitive effects of under-desk cycling compared to sitting for office workers. Appl Ergon 2019;79:7685. [CrossRef]
13. [12] Darvishi E, Maleki A, Giahi O, Akbarzadeh A. Subjective mental workload and its correlation with musculoskeletal disorders in bank staff. J Manipulative Physiol Ther 2016;39:420426. [CrossRef] [13] Besharati A, Daneshmandi H, Zareh K, Fakherpour A, Zoaktafi M. Work-related musculoskeletal problems and associated factors among office workers. Int J Occup Saf 2020;26:632638.
14. [CrossRef]
15. [14] Nourollahi-Darabad M, Afshari D & Gomari AE. The relationship between lifestyle and mental workload with the prevalence of musculoskeletal discomfort: A case study in the automotive industry. J Occup Hyg Eng 2022;9:102110. [CrossRef]
16. [15] Nino L, Marchak F, Claudio D. Physical and mental workload interactions in a sterile processing department. Int J Ind Ergon 2020;76:102902. [CrossRef]
17. [16] Wang X, Lavender SA, Sommerich CM, Rayo MF. Exploring the relationships between computer task characteristics, mental workload, and computer users’ biomechanical responses. Ergonomics 2022;65:12561265. [CrossRef]
18. [17] Muhammad MS. The relationship between musculoskeletal disorders and mental workload among female computer workers at services sector in Shah Alam (doctoral dissertation). Malaysia: University of Malaya; 2021.
19. [18] Nino V, Claudio D & Monfort SM. Evaluating the effect of perceived mental workload on work body postures. Int J Ind Ergon 2023;93:103399. [CrossRef]
20. [19] Darvishi E, Ghasemi F, Sadeghi F, Abedi K, Rahmati S & Sadeghzade G. Risk assessment of the work-related musculoskeletal disorders based on individual characteristics using path analysis models. BMC Musculoskelet Disord 2022;23:616. [CrossRef] [20] Sonne M, Villalta DL, Andrews DM. Development and evaluation of an office ergonomic risk checklist: ROSA–Rapid office strain assessment. Appl Ergon 2012;43:98108. [CrossRef]
21. [21] Chaiklieng S, Krusun M. Health risk assessment and incidence of shoulder pain among office workers. Procedia Manuf 2015;3:49414947. [CrossRef]
22. [22] Cornell University Ergonomics Web. Cornell Musculoskeletal Discomfort Questionnaires (CMDQ). Available at: http://ergo.human.cornell.edu/ahmsquest.html. Accessed on Dec 10, 2021.
23. [23] Hedge A, Morimoto S, McCrobie D. Effects of keyboard tray geometry on upper body posture and comfort. Ergonomics 1999;42:13331349. [CrossRef]
24. [24] Erdinc O, Hot K, Ozkaya M. Turkish version of the Cornell Musculoskeletal Discomfort Questionnaire: Cross-cultural adaptation and validation. Work 2011;39:251260. [CrossRef]
25. [25] Hart SG, Staveland LE. Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research. Adv Psychol 1988;52:139183. [CrossRef]
26. [26] Byers JC, Bittner Jr AC, Hill SG. Traditional and raw task load index (TLX) correlations: are paired comparisons necessary? Advances in Industrial Ergonomics and Safety I. Philadelphia: Taylor and Francis; 1989, p. 481485.
27. [27] Haghshenas B, Habibi E, Haji Esmaeil Hajar F, Sartang AG, van Wijk L, Khakkar S. The association between musculoskeletal disorders with mental workload and occupational fatigue in the office staff of a communication service company in Tehran, Iran, in 2017. J Occup Health Epidemiol 2018;7:2029. [CrossRef]
28. [28] Matos M, Arezes PM. Ergonomic evaluation of office workplaces with Rapid Office Strain Assessment (ROSA). Procedia Manuf 2015;3:46894694. [CrossRef]
29. [29] Ozkan NF, Kahya E. Assessing ergonomic risks in an university's administrative offices. J Fac Eng Archit Gazi Univ 2017;32:141150. [CrossRef]
30. [30] Shariat A, Cleland JA, Danaee M et al. Relationships between Cornell Musculoskeletal Discomfort Questionnaire and online Rapid Office Strain Assessment questionnaire. Iran J Public Health 2018;47:1756.
31. [31] Vahdatpour B, Bozorgi M, Taheri MR. Investigating musculoskeletal discomforts and their relation to workplace ergonomic conditions among computer office workers at Alzahra Hospital, Isfahan, Iran. Phys Med Rehabilit Electrodiagn 2019;1:5258.