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. 2022 Jun 21;12:10452. doi: 10.1038/s41598-022-14440-2

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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(a) The annual trend of the number of total knee arthroplasty (TKA) performed in rheumatoid arthritis (RA) patients. The OA-like RA group included RA patients whose radiographs were classified as osteoarthritis (OA) by the artificial intelligence (AI) model. The conventional RA group consisted of RA patients whose radiographs were classified as RA by the AI. (b) The annual trend of the ratio of the radiographic features of OA-like RA to the number of TKA performed in RA patients.