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Advancements in AMA Guides Musculoskeletal Impairment Evaluations: Improved Reliability and Ease of Use
J Mark Melhorn1, Barry Gelinas, Douglas W Martin
1From the Department of Orthopaedics, University of Kansas School of Medicine Wichita, Kansas (J.M.M.); International Academy of Independent Medical Evaluators, Vancouver, Washington (B.G.); CNOS Occupational Medicine, Dakota Dunes, South Dakota (D.W.M.); and Rocky Mountain Center for Occupational and Environmental Health, University of Utah, Weber State University, Utah (K.T.H., M.S.T.).
Objective:
Describe and evaluate methodological improvements in AMA Guides to the Evaluation of Permanent Impairment ( Guides ) Sixth Edition 2024, including an updated sequential method and enhanced diagnosis-based impairment tables, compared to the Guides Sixth 2008.
Methods:
Three physician experts and 3 premedical students, respectively, completed 2 rounds of impairment ratings using the AMA Guides Sixth 2008 versus 2024 methods. Impairment values and completion times using each method were compared for both groups.
Results:
Time to complete an impairment rating by experts averaged 3.5 minutes using Guides 2024 compared with 13.9 minutes using Guides 2008, with 100% accuracy and reliability for both. Students' time averaged 5.3 and 15.9 minutes, respectively, with increased accuracy and reliability with Guides 2024.
Conclusions:
The Guides Sixth 2024 allowed more efficient impairment ratings while retaining accuracy, consistency, reliability, and reproducibility.
