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. 2024 Jan 29;14:2364. doi: 10.1038/s41598-024-53017-z

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© The Author(s) 2024

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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Regional kyphosis angle examples in two patient groups from different time periods. (a–c) represent the preoperative, 1-month postoperative, and 9-month postoperative angles for a patient in the PPSF group. The correction loss percentage of regional kyphosis angle for this patient was 0% [(7–7)/7*100%]. (d–f) depict the corresponding angles for a patient in the OPSF group. The correction loss percentage of regional kyphosis angle for this patient was 38.46% [(18–13)/13*100%].