{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,25]],"date-time":"2025-10-25T13:25:35Z","timestamp":1761398735713,"version":"build-2065373602"},"reference-count":18,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T00:00:00Z","timestamp":1761091200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100017684","name":"Japan Dairy Association","doi-asserted-by":"publisher","award":["2017"],"award-info":[{"award-number":["2017"]}],"id":[{"id":"10.13039\/100017684","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Grant-in-Aid from the Ministry of Health, Labour and Welfare","award":["19FA0701"],"award-info":[{"award-number":["19FA0701"]}]},{"name":"Grant-in-Aid from the Ministry of Health, Labour and Welfare","award":["19FA1401"],"award-info":[{"award-number":["19FA1401"]}]},{"name":"Grant-in-Aid from the Ministry of Health, Labour and Welfare","award":["19FA1901"],"award-info":[{"award-number":["19FA1901"]}]},{"DOI":"10.13039\/100016399","name":"Japan Osteoporosis Foundation","doi-asserted-by":"publisher","award":["2019"],"award-info":[{"award-number":["2019"]}],"id":[{"id":"10.13039\/100016399","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100009619","name":"Japan Agency for Medical Research and Development","doi-asserted-by":"publisher","award":["17dk0110028h0001"],"award-info":[{"award-number":["17dk0110028h0001"]}],"id":[{"id":"10.13039\/100009619","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100009619","name":"Japan Agency for Medical Research and Development","doi-asserted-by":"publisher","award":["17gk0210007h0003"],"award-info":[{"award-number":["17gk0210007h0003"]}],"id":[{"id":"10.13039\/100009619","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100008734","name":"Mitsui Sumitomo Insurance Welfare Foundation","doi-asserted-by":"publisher","award":["2016"],"award-info":[{"award-number":["2016"]}],"id":[{"id":"10.13039\/100008734","id-type":"DOI","asserted-by":"publisher"}]},{"name":"JSPS KAKENHI","award":["JP18K18447"],"award-info":[{"award-number":["JP18K18447"]}]},{"name":"JSPS KAKENHI","award":["JP19H03895"],"award-info":[{"award-number":["JP19H03895"]}]},{"name":"JSPS KAKENHI","award":["JP19K19454"],"award-info":[{"award-number":["JP19K19454"]}]},{"DOI":"10.13039\/100008731","name":"Nakatomi Foundation","doi-asserted-by":"publisher","award":["2019"],"award-info":[{"award-number":["2019"]}],"id":[{"id":"10.13039\/100008731","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Foot &amp; Ankle Specialist"],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>The accessory navicular is a common anatomical variant of the foot that may become symptomatic and occasionally require treatment, particularly in younger individuals. Recent evidence indicates that accessory navicular may be associated with posterior tibial tendon dysfunction in middle-aged and elderly individuals, potentially affecting physical function. However, research on its impact in this demographic remains limited. This study aims to assess the epidemiology and impact of accessory navicular, particularly type 2, on physical function in the general population.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Data from the fifth Research on Osteoarthritis\/Osteoporosis Against Disability (ROAD) study were analyzed, including foot radiographs and physical examinations from 1995 participants. The presence and type of accessory navicular were determined, and physical function was assessed through stabilometer measurements, walking speed tests, and locomotive syndrome risk tests. In addition, the relevant items related to balance and falls were extracted from the structured interviews and analyzed for the relationship with the accessory navicular.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The prevalence of accessory navicular was higher in females (49.9%) than in males (43.2%), with type 2 being the most frequent type. The analysis revealed a high degree of bilateral symmetry, with 79.5% of males and 76.7% of females showing the same type of accessory navicular or absence thereof on both sides. No significant differences were found in physical performance measurements between feet with and without type 2 accessory navicular. Notably, a higher history of falls was associated with bilateral type 2 accessory navicular.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>This study provides insights into the prevalence and type distribution of accessory navicular in the general population. While type 2 accessory navicular did not show significant impacts on physical performance, its association with a history of falls suggests potential implications for dynamic balance ability, warranting further investigation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>\n                      <jats:bold>Levels of Evidence<\/jats:bold>\n                      :\n                    <\/jats:title>\n                    <jats:p>\n                      <jats:italic toggle=\"yes\">Level III retrospective case-control study<\/jats:italic>\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/19386400251377124","type":"journal-article","created":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T11:33:58Z","timestamp":1761132838000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Epidemiology and Impact of Accessory Navicular on Physical Function in the General Population: Insights From a Large Population-Based Cohort ROAD Study"],"prefix":"10.1177","author":[{"given":"Yuji","family":"Maenohara","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2363-9803","authenticated-orcid":false,"given":"Takumi","family":"Matsumoto","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toshiko","family":"Iidaka","sequence":"additional","affiliation":[{"name":"Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical &amp; Research Center, Faculty of Medicine, University of Tokyo, Bunkyo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chiaki","family":"Horii","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroyuki","family":"Oka","sequence":"additional","affiliation":[{"name":"Division of Musculoskeletal AI System Development, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shigeyuki","family":"Muraki","sequence":"additional","affiliation":[{"name":"Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical &amp; Research Center, Faculty of Medicine, University of Tokyo, Bunkyo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Hashizume","sequence":"additional","affiliation":[{"name":"School of Health and Nursing Science, Wakayama Medical University, Wakayama, Japan"},{"name":"Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Yamada","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Munehito","family":"Yoshida","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kozo","family":"Nakamura","sequence":"additional","affiliation":[{"name":"Sumiya Orthopaedic Hospital, Wakayama, Japan"},{"name":"Towa Hospital, Adachi-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sakae","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noriko","family":"Yoshimura","sequence":"additional","affiliation":[{"name":"Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical &amp; 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