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The analysis included 209 osteoporosis patients and 54 adult spinal deformity patients, grouped by PI–LL (\u003C20° vs ≥20°). Key sagittal parameters and HRQOL (JOABPEQ) were correlated with radiographic measures, focusing on their relationship with SVA. The new index, PFA–(PI–LL), showed the strongest association with SVA and was linked to anterior trunk inclination and HRQOL across domains.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/proposal-of-a-new-indicator-of-hip-compensation-for-spinopelvichip-mismatch-a-retrospective-study-in-japan/434082/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/proposal-of-a-new-indicator-of-hip-compensation-for-spinopelvichip-mismatch-a-retrospective-study-in-japan/434082.png","ImageObject",300,407,{"name":92,"@type":93},"Ophelia","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What was the purpose of the study?","Question",{"text":113,"@type":114},"To develop an indicator of hip compensatory capacity in response to spinopelvic mismatch using standard radiographs.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How were patients grouped in the analysis?",{"text":118,"@type":114},"Patients were divided into PI–LL \u003C20° and PI–LL ≥20° groups, based on pelvic incidence–lumbar lordosis.",{"name":120,"@type":111,"acceptedAnswer":121},"Which parameter showed the strongest association with SVA?",{"text":122,"@type":114},"PFA–(PI–LL) demonstrated the strongest association with the sagittal vertical axis (SVA) and explained variations in sagittal alignment in both groups.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},434082,1790760572,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":146,"preview_page_count":4},7971461741311,"https://ap-avatar.wpscdn.com/avatar/74000253aff267980c6?x-image-process=image/resize,m_fixed,w_180,h_180&k=1779345379180704826","Clinical Study  \nASJ  \nAsian Spine J. 2025;19(6): 967-977 [https://doi.org/10.31616/asj.2024.0475](https://doi.org/10.31616/asj.2024.0475)[ ](https://doi.org/10.31616/asj.2024.0475)PISSN 1976-1902 • eISSN 1976-7846  \nProposal of a new indicator of hip compensation for spinopelvic–hip mismatch: a retrospective study in Japan  \nRyo Fujita, Kohei Takahashi, Ko Hashimoto, Kazuyoshi Baba, Kenichiro Yahata, Takahiro Onoki, Takashi Aki, Keisuke Ishikawa, Toshimi Aizawa  \nDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan  \nProposal of a new indicator of hip compensation for  \nspinopelvic–hip mismatch: a retrospective study in Japan  \nResults  \n4003002001000 –100  \n– 20 0 20 40 60 80 100  \nPI–LL (°)  \n4003002001000 –100 100 120 140 160 180 200 220  \nPFA–(PI–LL) (°)  \nAmong all parameters, PFA–(PI–LL) demonstrated the strongest association with SVA.  \nScatter diagrams between SVA and PI–LL  \nScatter diagrams between SVA and PFA–(PI–LL)  \nPI  \n–  \n–  \nLL ≥20  \nLL \u003C20  \n°  \nPI  \n°  \ngroup  \n–  \ngroup  \n–  \nLL was  \nLL  \nnot  \ncorrelated  \ncorrelated  \nwith PFA  \nwith PFA  \nSVA (mm)  \nSVA (mm)  \nSignificant correlations were observed between the radiographic parameters and JOABPEQ scores across all domains.  \nCONCLUSION  \nPFA–(PI–LL), which represented spinopelvic–hip mismatch, was a reliable indicator of hip compensatory function in terms of anterior trunk inclination and HRQOL.  \nRyo Fujita et al. Asian Spine J. 2025;19(6): 967-977.  \n[doi.org/10.31616/asj.2024.0475](doi.org/10.31616/asj.2024.0475)  \nReceived Nov 19, 2024; Revised Apr 13, 2025; Accepted Apr 17, 2025  \nCorresponding author: Ryo Fujita  \nDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan Tel: +81-22-717-7245, Fax: +81-22-717-7248, E-mail: [ryo.fujita.e7@tohoku.ac.jp](ryo.fujita.e7@tohoku.ac.jp)  \nCopyright Ⓒ 2025 by Korean Society of Spine Surgery  \nThis is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ([http://creativecommons.org/licenses/by-nc/4.0/](http://creativecommons.org/licenses/by-nc/4.0/)) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.  \nAsian Spine Journal • pISSN 1976-1902 eISSN 1976-7846 • [www.asianspinejournal.org](www.asianspinejournal.org)  \nProposal of a new indicator of hip compensation for spinopelvic–hip mismatch: a retrospective study in Japan  \nRyo Fujita, Kohei Takahashi, Ko Hashimoto, Kazuyoshi Baba, Kenichiro Yahata, Takahiro Onoki, Takashi Aki, Keisuke Ishikawa, Toshimi Aizawa  \nStudy Design: retrospective study.  \nPurpose: This study aimed to develop an indicator of the compensatory capacity of hip joints in response to spinopelvic mismatch using standard radiographs.  \nOverview of Literature: EOS imaging has enabled detailed analysis of hip and lower extremity compensation in sagittal malalignment. However, its high cost and limited availability hinder widespread clinical use. Currently, there are no established indicators to assess hip compensation for spinopelvic mismatch using standard radiographs.  \nMethods: A total of 209 patients with osteoporosis and 54 with adult spinal deformities were included. Patients were divided into two groups based on pelvic incidence–lumbar lordosis (PI–LL): \u003C20° and ≥20° groups. The sagittal vertical axis (SVA), thoracic kyphosis, PI, pelvic tilt (PT), LL, sacral slope, and pelvic femoral angle (PFA) were measured. Health-related quality of life (HRQOL) was assessed in 86 patients using the Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ) . A new index, PFA–(PI–LL), was defined as spinopelvic–hip mismatch. Correlation coefficients were calculated for each radiographic parameter, and the coefficient of determination (R2) for the relationship of each parameter with SVA was evaluated in both groups. The corr","cbCaihbMhJXrQmTs","https://ap.wps.com/l/cbCaihbMhJXrQmTs","pdf",1590680,11,"English","# Study design\n## Purpose\n## Methods\n## Results\n## Conclusions\n# Introduction\n## Background and rationale\n## Spinopelvic parameters and hip–spine syndrome","[{\"question\":\"What was the purpose of the study?\",\"answer\":\"To develop an indicator of hip compensatory capacity in response to spinopelvic mismatch using standard radiographs.\"},{\"question\":\"How were patients grouped in the analysis?\",\"answer\":\"Patients were divided into PI–LL \\u003c20° and PI–LL ≥20° groups, based on pelvic incidence–lumbar lordosis.\"},{\"question\":\"Which parameter showed the strongest association with SVA?\",\"answer\":\"PFA–(PI–LL) demonstrated the strongest association with the sagittal vertical axis (SVA) and explained variations in sagittal alignment in both groups.\"}]","Proposal of a new indicator of hip compensation for spinopelvic–hip mismatch - a retrospective study in Japan | PDF",1790666813,28]