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Development and Validation of Agricultural Whole Body Assessment (AWBA)

농작업 자세 평가도구의 개발과 타당성 검증 연구

  • Kong, Yong-Ku (Sungkyunkwan University, Department of Industrial Engineering) ;
  • Lee, Kyung Suk (National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Ju-Hee (Sungkyunkwan University, Department of Industrial Engineering) ;
  • Choi, Kyeong-Hee (Sungkyunkwan University, Department of Industrial Engineering)
  • 공용구 (성균관대학교 산업공학과) ;
  • 이경숙 (국립농업과학원 농촌진흥청) ;
  • 이주희 (성균관대학교 산업공학과) ;
  • 최경희 (성균관대학교 산업공학과)
  • Received : 2018.08.02
  • Accepted : 2018.10.12
  • Published : 2018.10.31

Abstract

Objective: The purposes of this study were to validate the accuracy of AWBA (Agricultural Whole Body Assessment) by comparing with expert's evaluation and to suggest the improvements of AWBA based on the results of this study. Background: In the agriculture field, many tasks could have awkward postures such as back, neck, and knee flexion according to the crops and growing processes. Many risk assessment tools such as RULA (Rapid Upper Limb Assessment), REBA (Rapid Entire Body Assessment), OWAS (Ovako Working posture Analysis System) have been used to quantify these awkward working postures. However, existing posture assessment tools were developed focused on the manufacturing industry, not on the agricultural tasks which require different types of working postures with the industry sites. Thus there are many limitations for applying these assessment tools to evaluate agricultural working postures. To overcome these limitations, AWBA has been developed with focusing on the agricultural tasks. Method: The validation study of AWBA was conducted based on comparison with the expert's evaluation results. For validation study, a total of 80 working postures were selected from pepper and bean crops. At least one representative working posture was obtained from each unit work for each crop, and the experts were asked to evaluate subjective risk levels for all 80 working postures with 4 risk levels. To compare the agreements between AWBA analyses and experts' evaluations vs. between other existing assessment tools' analyses and experts' evaluations, percent of agreement and weighted kappa analysis were applied. Based on these results, improvements of AWBA were also suggested in this study. Results: The largest percent of agreement (44.4%) was obtained from AWBA and it is significantly larger than the percent of agreement of existing assessment tools [RULA (28.3%), REBA (37.6%), OWAS (28.6%)]. Kappa values of AWBA and REBA were 0.44 and 0.47, which means 'moderate consistency' also significantly larger than results of RULA and OWAS. Results also showed that there are some difference between AWBA and expert's evaluation at the back flexion posture (at $90^{\circ}$) and standing posture. Based on this, ABWA was revised and thus a revised Kappa value has been changed to 0.62 which means 'substantial to almost perfect'. Conclusion: The agreement between AWBA and expert's results was significantly higher than existing assessment tools. However some revisions were needed to improve the accuracy of AWBA. Thus, AWBA was revised based on the results of this study and the revised AWBA which was improved has been suggested. Application: The results of this study could be applied for evaluation of agricultural working postures and may lead to improve the accuracy of risk evaluation in agricultural field. Eventually, it could improve the work environment and reduce work-related musculoskeletal disorders.

Keywords

References

  1. Allen, C.E., Muscle action potentials used in the study of dynamic anatomy, The British Journal of Physical Medicine: including its application to industry, 11(3), 66-73, 1948.
  2. Andersson, E.A., Oddsson, L.I.E., Grundström, H., Nilsson, J. and Thorstensson, A., EMG activities of the quadratus lumborum and erector spinae muscles during flexion-relaxation and other motor tasks, Clinical Biomechanics, 11(7), 392-400, 1996. https://doi.org/10.1016/0268-0033(96)00033-2
  3. Armstrong, T.J., Upper-extremity posture: definition, measurement and control, The Ergonomics of Working Postures, 59-73, 1986.
  4. Blackman, N.J.M. and Koval, J.J., Interval estimation for Cohen's kappa as a measure of agreement. Statistics in Medicine, 19(5), 723-741, 2000. https://doi.org/10.1002/(SICI)1097-0258(20000315)19:5<723::AID-SIM379>3.0.CO;2-A
  5. Dickey, J.P., McNorton, S. and Potvin, J.R., Repeated spinal flexion modulates the flexion-relaxation phenomenon. Clinical Biomechanics, 18(9), 783-789, 2003. https://doi.org/10.1016/S0268-0033(03)00166-9
  6. Floyd, W.F. and Silver, P.H.S., Function of erectores spinae in flexion of the trunk. The Lancet, 257(6647), 133-134, 1951. https://doi.org/10.1016/S0140-6736(51)91212-3
  7. Floyd, W.F. and Silver, P.H.S., The function of the erectores spinae muscles in certain movements and postures in man. The Journal of Physiology, 129(1), 184-203, 1955. https://doi.org/10.1113/jphysiol.1955.sp005347
  8. Jung, M.C., Park, D., Lee, S.J., Lee, K.S., Kim, D.M. and Kong, Y.K., The effects of knee angles on subjective discomfort ratings, heart rates, and muscle fatigue of lower extremities in static-sustaining tasks. Applied Ergonomics, 42(1), 184-192, 2010. https://doi.org/10.1016/j.apergo.2010.07.004
  9. Kee, D.H., Investigation on status of musculoskeletal disorders for industrial safety managers, Journal of the Ergonomics Society of Korea, 22(4), 79-90, 2003. https://doi.org/10.5143/JESK.2003.22.4.079
  10. Kee, D.H. and Park, K.H., Comparison of posture classification schemes of OWAS, RULA and REBA, Journal of the Korean Society of Safety, 20(2), 127-132, 2005.
  11. Kim, H.H., Park, H.J., Park, K.H., Kim, W., Yoo, C.Y., Kim, J.H. and Park, J.S., An Analysis of characteristics of musculoskeletal disorders risk factors, Journal of the Ergonomics Society of Korea, 28(3), 17-25, 2009. https://doi.org/10.5143/JESK.2009.28.3.017
  12. Kim, M.J. and Choi, J.H., A study for farmers to reduce work load on the different working conditions (II) - Cultivating welsh onion in the summer ground, The Korean Journal of Community Living Science, 8(2), 119-124, 1997.
  13. Ko, S.B., Work-related diseases and injury of Korean farmer: Cause, epidemiology, and countermeasure, Journal of the Korean Medical Association, 55(11), 1044-1045, 2012. https://doi.org/10.5124/jkma.2012.55.11.1044
  14. Kong, Y.K., Lee, S.J., Lee, K.S. and Seo, M.T., The effects of coordinated upper-limb postures of back, shoulder, and elbow flexion angles on the subjective discomfort rating, heart rate, and muscle activities, Journal of the Ergonomics Society of Korea, 30(6), 695-703, 2011. https://doi.org/10.5143/JESK.2011.30.6.695
  15. Kong, Y.K., Lee, S.Y., Lee, K.S. and Kim, D.M. Comparisons of ergonomic evaluation tools (ALLA, RULA, REBA and OWAS) for farm work, International Journal of Occupational Safety and Ergonomics, 24(2), 218-223, 2018. https://doi.org/10.1080/10803548.2017.1306960
  16. KOSHA (Korea Occupational Safety & Health Agency), Industrial Accident Statistics, 2005.
  17. Lee, C.G., Work-related musculoskeletal disorders in Korean farmers, Journal of the Korean Medical Association, 5(11), 1054-1062, 2012.
  18. Lee, I., Jeong, M.K. and Choe, G.I., Comparison of observational posture evaluation methods based on perceived discomfort, Journal of the Ergonomics Society of Korea, 22(1), 43-56, 2003. https://doi.org/10.5143/JESK.2003.22.1.043
  19. McGill, S.M. and Kippers, V., Transfer of loads between lumbar tissues during the flexion-relaxation phenomenon, Spine, 19(19), 2190-2196, 1994. https://doi.org/10.1097/00007632-199410000-00013
  20. Miedema, M.C., Douwes, M. and Dul, J., Recommended maximum holding times for prevention of discomfort of static standing postures, International Journal of Industrial Ergonomics, 19(1), 9-18, 1997. https://doi.org/10.1016/0169-8141(95)00037-2
  21. Ministry of Employment and Labor, 2017 Status of Industrial Accidents, 2017.
  22. Moon, C., Comparison of observational posture evaluation methods using maximum holding times of symmetric and asymmetric working postures, Pohang University, Pohang, Korea, 2003.
  23. Nagura, T., Dyrby, C.O., Alexander, E.J. and Andriacchi, T.P., Mechanical loads at the knee joint during deep flexion, Journal of Orthopaedic Research, 20(4), 881-886, 2002. https://doi.org/10.1016/S0736-0266(01)00178-4
  24. Putz-Anderson, V., Bernard, B.P., Burt, S.E., Cole, L.L., Fairfield-Estill, C., Fine, L.J. and Nelson, N., Musculoskeletal disorders and workplace factors, National Institute for Occupational Safety and Health (NIOSH), 104, 1997.
  25. Sakamoto, K. and Swie, Y.W., EMG characteristics of low back and lower limb muscles during forward bending posture, Electromyography and Clinical Neurophysiology, 43(6), 335-347, 2003.
  26. Shirado, O., Ito, T., Kaneda, K. and Strax, T.E., Flexion-relaxation phenomenon in the back muscles. A comparative study between healthy subjects and patients with chronic low back pain, American Journal of Physical Medicine & Rehabilitation, 74(2), 139-144, 1995. https://doi.org/10.1097/00002060-199503000-00010
  27. Westgaard, R.H. and Aaras, A., Postural muscle strain as a causal factor in the development of musculo-skeletal illnesses, Applied Ergonomics, 15(3), 162-174, 1984. https://doi.org/10.1016/0003-6870(84)90057-7