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Work-related amputations in Washington state, 1997-2005.
Naomi J Anderson1, David K Bonauto, Darrin Adams
1Department of Labor & Industries, Olympia, Washington 98504-4330, USA. anna235@lni.wa.gov <anna235@lni.wa.gov>
American Journal of Industrial Medicine
|February 27, 2010
Summary
New methods reveal work-related amputations are significantly underestimated in Washington State. Utilizing alternative case identification, an estimated 150% more amputations occurred, highlighting a substantial public health burden.
Area of Science:
- Occupational Health
- Injury Surveillance
- Workers' Compensation
Background:
- Work-related amputations are severe injuries.
- Accurate estimation of amputation burden and at-risk industries is crucial.
- Washington State's occupational surveillance program sought improved case identification methods in workers' compensation data.
Purpose of the Study:
- To compare two methods for identifying work-related amputations in Washington State workers' compensation data.
- To more accurately estimate the burden of amputations and identify high-risk industries.
Main Methods:
- Two case identification methods were employed: ANSI Z16 nature code for amputation and an alternative method using medical billing and claims data.
- Suspected amputation claims from both methods were reviewed against medical records for verification.
Main Results:
- The ANSI Z16 code identified 2,528 amputations, while the alternative method identified 3,912 amputations between 1997 and 2005.
- The ANSI method showed an increasing trend in amputations, whereas the alternative method showed a decreasing trend, suggesting potential misclassification bias.
- Manufacturing, Construction, Agriculture, Forestry, Fishing and Hunting, Accommodation and Food Services, and Wholesale and Retail Trade had the highest amputation claims rates.
Conclusions:
- Existing methods for identifying work-related amputations in Washington State's workers' compensation system underestimate the true burden.
- Alternative case identification methods suggest approximately 150% more amputations occurred during the study period.
- Improved surveillance methods are necessary for a comprehensive understanding of occupational amputation injuries.
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