Background: The association between Patient-Rated Elbow Evaluation: Japanese version (PREE-J) and Japanese Orthopaedic Association-Japan Elbow Society Elbow Function score (JOA-JES score) is unclear. This study evaluated the association between PREE-J and JOA-JES scores. Methods: The patients with elbow disorders were divided into two groups: Group A (conservative treatment, n = 97) and Group B (surgical treatment, n = 156). The patients were also divided into four disease subgroups according to the JOA-JES classification (rheumatoid arthritis, trauma, sports, and epicondylitis groups), and the association between PREE-J and JOA-JES scores in each disease category was examined. In group B, associations between PREE-J and JOA-JES scores were examined pre-and postoperatively. Results: In group A, there were significant associations between PREE-J and JOA-JES scores. In group B, a strong association between preoperative PREE-J and JOA-JES scores was observed in all disease categories. There was also a significant association between postoperative PREE-J and JOA-JES scores. Additionally, group B showed significant postoperative improvements in PREE-J and JOA-JES scores. Conclusions: The PREE-J score correlates well with the JOA-JES score and reflects treatment response before and after treatment.
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