The Relationship between Low Back Discomfort Ratings and the NIOSH Lifting Index

Abstract

An epidemiological study was performed to evaluate the relation between lowback discomfort ratings and use of the revised NIOSH lifting guide to assess the risk of manual material handling (MMH) tasks. We surveyed 97 MMH workers on site in 15 factories and designed a questionnaire to systematically collect jobrelated information. Approximately 90% of the workers had suffered various degrees of lower back discomfort, and 80% had sought medical treatment. The survey showed that 42 of the 97 jobs analyzed had a recommended weight limit of 0, which was attributed to either a horizontal distance or a lifting frequency that exceeded the bounds of the NIOSH lifting index. Apparently, the limits for horizontal distance and maximum allowable frequency are too stringent to accommodate many existing MMH jobs. For the remaining 55 jobs, the significant positive correlation obtained between the lifting index and the severity of low-back discomfort suggests that the lifting index is reliable in assessing the potential risk of low-back injury in MMH. These findings provide useful information on the application of the NIOSH lifting guide to the assessment of lowback pain.

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References

Donajkowski, K. L. (1993, September). Back injury: Causes, prevention, treatment. Professional Safety, 21–26.

Frymoyer, J. W. , & Gorden, S. L. (1989). New perspectives on low back pain. Park Ridge, IL: American Academy of Orthopedic Surgeons.

Hidalgo, J. , Genaidy, A. , Karwowski, W. , Christensen, D. , Huston, R. , & Stambough, J. (1995). A cross-validation of the NIOSH limits for manual lifting. Ergonomics, 38, 2455–2464.

Lee, K. S. , Park, H. S. , & Chun, K. S. (1996). The validity of the revised NIOSH weight limit in a Korean young male population: A psychophysical approach. International Journal of Industrial Ergonomics, 18(2-3), 181–186.

Leskinen, T. , & Haijanen, J. (1996). Torque on the low back and the weight limits recommended by NIOSH in simulated lifts. In Proceedings of the Fourth International Symposium on 3-D Analysis of Human Movement (Session 4, Paper 7). Grenoble, France: Université Joseph Fourier.

National Institute for Occupational Safety and Health (NIOSH) . (1981). Work practices guide for manual lifting (DHHS 81-122). Cincinnati, OH: U.S. Department of Health and Human Services.

NIOSH . (1995). Ergonomics health hazard evaluation: Schrock Cabinet Company, Arthur, Illinois (HETA 95-0335-2566). Cincinnati, OH: U.S. Department of Health and Human Services.

NIOSH . (1996). Ergonomic interventions for the soft drink beverage delivery industry (DHHS 96-109). Cincinnati, OH: U.S. Department of Health and Human Services.

National Safety Council . (1992). Accident facts. Chicago, IL: Author.

10.

Waters, T. R. , Putz-Anderson, V. , Garg, A. , & Fin, L. J. (1993). Revised NIOSH equation for the design and evaluation of manual lifting tasks. Ergonomics, 36, 749–776.