Work-Related Musculoskeletal Disorder Claim Rate and Rate Ratios; Washington State, by Risk Classification and North American Industry Classification

These data are collected from Washington Workers' Compensation system files (State Fund and Self-Insured). They provide industry specific Work-related Musculoskeletal Disorder (WMSD) claim rates. Risks for WMSDs vary across industries. The rates are for ‘compensable’ claims which are those that typically involve expenses beyond medical treatment such as wage replacement, or disability payments. The rate of compensable claims, expressed as the number of compensable claims per 1,000 full-time equivalent workers, is provided for the Washington workers’ compensation risk classifications, and four levels of the North American Industry Classification System - industry sector, industry sub-sector, industry group and industry. A comparison measure of the industry’s rate to the overall state workers’ compensable WMSD claim rate, a ‘rate ratio’ is provided.

Data and Resources

Additional Info

Field Value
Source https://data.wa.gov/resource/7w96-mhxh
Author Darrin Adams
Last Updated July 22, 2025, 20:04 (UTC)
Created July 22, 2025, 20:04 (UTC)
1. Research reports describing the WMSD case definition and WMSD claim data are available at https://lni.wa.gov/safety-health/safety-research/ongoing-projects/wmsd-claim-tracking#publications
2. State level estimates of the overall compensable claim rate by risk classification and North American Industry Classification are slightly different due to a small number of workers’ compensation accounts without NAICS codes. If these data are used for legislation the overall compensable claim rate will be based on the final language of the legislation.
3. The NAICS code represents the employer’s primary economic activity although some employers have business activities that may encompass multiple industry classifications. The industrial classification of some businesses may evolve over time.
4. One full-time equivalent employee (FTE) is 2,000 hours. Rate ratios were calculated from unrounded rate data (rates presented in table are rounded to tenths place). These are not actuarial estimates.
5. NAICS reference edition is 2007 (https://www.census.gov/naics/?58967?yearbck=2007). Washington State Risk Classifications are similar in concept to NCCI Coding. Washington classifications are defined in administrative code - https://apps.leg.wa.gov/WAC/default.aspx?cite=296-17A
Category health
Period of Time Calendar Year 2016 - 2020
Posting Frequency 1 Time
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harvest_source_title washington-state