{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T17:25:10Z","timestamp":1770744310333,"version":"3.49.0"},"reference-count":27,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2023,3,22]],"date-time":"2023-03-22T00:00:00Z","timestamp":1679443200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Postoperative spinopelvic changes are associated with increased dislocation risk following total hip arthroplasty (THA). The aim of this study was to identify preoperative patient and radiographic factors associated with high\u2010risk postoperative spinopelvic parameters. A retrospective review of consecutive THA patients who received preoperative and postoperative sitting and standing lateral lumbar spine\u2010hip radiographs with minimum radiographic and clinical follow\u2010up of 10 months was performed. Patient demographics were recorded and preoperative standing and sitting sacral slope (SS), anteinclination, pelvic femoral angle (PFA), and combined sagittal index (CSI) were measured. High\u2010risk patients were defined by decreased spinopelvic motion (\u2206SS from sitting to standing of &gt;10\u00b0), increased hip motion (\u2206PFA from sitting to standing of &gt;10\u00b0), or decreased CSI of &gt;10\u00b0 at final follow\u2010up compared with preoperative measurements. Univariate and multivariate regression analyses were used to identify preoperative demographic and radiographic factors associated with these high\u2010risk categories. One hundred and fifty\u2010three patients were included with an average age of 62 years, average body mass index of 27.8\u2009kg\/m<jats:sup>2<\/jats:sup>, and average follow\u2010up of 16.2 months. At 1\u2010year follow\u2010up, 43 (28.1%) patients demonstrated a decreased \u2206SS\u2009&gt;\u200910\u00b0 and 67 (43.7%) patients demonstrated an increased \u2206PFA\u2009&gt;\u200910\u00b0 compared with preoperative values. Sitting CSI decreased by &gt;10\u00b0 in 17 (11.1%) patients. Preoperative increased sitting PFA (adjusted odds ratio [aOR] 1.057, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and decreased preoperative hip motion (\u2206PFA) were associated with decreased sitting CSI of &gt;10\u00b0 at 10\u2010month follow\u2010up. Increased spinopelvic motion (\u2206SS) and decreased hip motion (\u2206PFA) preoperatively are associated with postoperative radiographic changes that be\u00a0associated with increased dislocation risk.<\/jats:p>","DOI":"10.1002\/jor.25555","type":"journal-article","created":{"date-parts":[[2023,3,16]],"date-time":"2023-03-16T03:12:37Z","timestamp":1678936357000},"page":"2026-2031","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Preoperative radiographic findings associated with postoperative spinopelvic risk factors for instability following total hip arthroplasty"],"prefix":"10.1002","volume":"41","author":[{"given":"Emily S.","family":"Mills","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabriel J.","family":"Bouz","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyunwoo P.","family":"Kang","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian C.","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jennifer C.","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taro","family":"Tezuka","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Yokohama City University Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lawrence D.","family":"Dorr","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1293-1702","authenticated-orcid":false,"given":"Nathanael D.","family":"Heckmann","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Keck School of Medicine of the University of Southern California Los Angeles California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,3,22]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(07)60457-7"},{"key":"e_1_2_7_3_1","unstructured":"FingarKR StocksC WeissAJ SteinerCA. Most frequent operating room procedures performed in U.S. hospitals 2003\u20102012.\u00a0Statistical Brief #186.\u00a0 Healthcare Cost and Utilization Project (HCUP) Statistical Briefs [Internet].2014."},{"key":"e_1_2_7_4_1","unstructured":"PfuntnerA WierLM StocksC. Most frequent procedures performed in U.S. hospitals 2010. Statistical brief #149. Healthcare Cost and Utilization Project (HCUP) Statistical Briefs. 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