{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,17]],"date-time":"2026-05-17T13:08:23Z","timestamp":1779023303380,"version":"3.51.4"},"reference-count":23,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2026,2,20]],"date-time":"2026-02-20T00:00:00Z","timestamp":1771545600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Foot Ankle Int."],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Middle facet subluxation (MFS) of the subtalar joint is a key indicator of peritalar subluxation in progressive collapsing foot deformity (PCFD). Although its assessment relies on weightbearing computed tomography (WBCT), it remains unclear which weightbearing radiographic (WBR) measurements correlate with MFS. We hypothesize that radiographic parameters assessing hindfoot alignment are correlated with MFS.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Seventy-three feet diagnosed with PCFD were evaluated using WBR and WBCT. Five parameters were measured in both modalities: talonavicular coverage (TNC) angle, hindfoot moment arm (HMA), talo\u2013first metatarsal angle, calcaneal pitch angle, and sinus tarsi impingement. MFS was then measured on WBCT. Multivariate and bivariate regression analyses were used to identify which WBR measurements predict or correlate with MFS. Partition analysis was used to identify cutoff values for WBR measurements linked with MFS.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Multivariate regression identified TNC angle and HMA as combined MFS predictors (\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      \u00b2\u2009\n                      <jats:italic toggle=\"yes\">=<\/jats:italic>\n                      \u20090.524,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.0001). In the bivariate analysis, TNC angle demonstrated a moderate individual correlation with MFS (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      \u2009=\u20090.68), whereas HMA showed a weak individual correlation (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      \u2009=\u20090.39). Partition analysis identified practical radiographic thresholds (TNC angle\u2009\u2265\u200938 degrees, HMA\u2009\u2265\u200911.4\u2009mm) for MFS\u2009\u226518% yet these thresholds explained only 27.3% of variability (\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      \u00b2\u2009=\u20090.273).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>\n                      TNC angle and HMA are the most useful WBR measurements for identifying MFS in PCFD. In settings without WBCT access, these offer a practical assessment tool, associated with MFS\u2009\u226518%; however, these cutoffs accounted for only 27.3% of variance (\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      \u00b2\u2009=\u20090.273), underscoring residual unexplained factors.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10711007251413577","type":"journal-article","created":{"date-parts":[[2026,2,20]],"date-time":"2026-02-20T10:00:05Z","timestamp":1771581605000},"page":"682-692","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity"],"prefix":"10.1177","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-6089-6774","authenticated-orcid":false,"given":"Erik Jes\u00fas","family":"Hu\u00e1nuco Casas","sequence":"first","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"},{"name":"Department of Traumatology and Orthopaedics, Delgado Clinic, Lima, Per\u00fa"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4103-6136","authenticated-orcid":false,"given":"Antoine","family":"Acker","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"},{"name":"Centre of Foot and Ankle Surgery, Clinique La Colline, Geneva, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8707-1108","authenticated-orcid":false,"given":"Chien-Shun","family":"Wang","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"},{"name":"Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan"},{"name":"Department of Surgery, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emily","family":"Luo","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9033-3946","authenticated-orcid":false,"given":"Wolfram","family":"Gr\u00fcn","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"},{"name":"Institute of Clinical Medicine, University of Oslo, Norway"},{"name":"Department of Orthopaedic Surgery, \u00d8stfold Hospital Trust, Gr\u00e5lum, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1911-9610","authenticated-orcid":false,"given":"Tommaso","family":"Forin Valvecchi","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"},{"name":"ASST Gaetano Pini, Milano, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0163-6516","authenticated-orcid":false,"given":"Fran\u00e7ois","family":"Lintz","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, USA"},{"name":"Ramsay Healthcare, Clinique de l'Union, Department of Foot and Ankle Surgery, Saint Jean, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6037-0685","authenticated-orcid":false,"given":"Cesar","family":"de Cesar Netto","sequence":"additional","affiliation":[{"name":"Duke University School of Medicine, Foot and Ankle Division of Orthopaedics, Durham, NC, 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