{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T12:04:16Z","timestamp":1789301056445,"version":"build-2803163510"},"reference-count":40,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T00:00:00Z","timestamp":1789257600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T00:00:00Z","timestamp":1789257600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["arthroscopyjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"abstract":"\n Purpose<\/jats:title>\n To evaluate the association of femoral version, McKibbin index, and femoral impingement index (FII) on patient\u2010reported outcomes after primary hip arthroscopy for femoroacetabular impingement syndrome.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n We retrospectively reviewed prospectively collected data from a hip preservation registry. Inclusion criteria included T\u00f6nnis grade \u22641 and a minimum 2\u2010year follow\u2010up. Computed tomography\u2010based morphologic parameters and validated patient\u2010reported outcomes (modified Harris Hip Score, hip outcome score\u2010activities of daily living, hip outcome score\u2010sport\u2010specific subscale, and International Hip Outcome Tool) were analyzed. Patients were stratified by femoral version, McKibbin index, and FII (low <45\u00b0, moderate 45\u00b0\u201075\u00b0, high >75\u00b0). Multivariable regression adjusted for age and preoperative scores was used to assess outcomes and achievement of the minimal clinically important difference.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n A total of 456 hips met inclusion criteria, with significant improvements across all outcome measures at a mean follow\u2010up of 2.6 years (\n P<\/jats:italic>\n \u2009<\u2009.001). No significant differences in outcomes were observed when stratified by femoral version or McKibbin index. However, patients with high FII (>75\u00b0), predominantly men, displayed lower net improvement in hip outcome score\u2010sport\u2010specific subscale scores (14.6 vs 28.1 and 33.4 in moderate and low FII groups, respectively;\n P<\/jats:italic>\n \u2009=\u2009.024) and reduced odds of achieving the minimal clinically important difference (53% vs 75% in low FII group;\n P<\/jats:italic>\n \u2009=\u2009.047). Among men, increasing FII was associated with significantly lower improvements in hip outcome score\u2010activities of daily living and hip outcome score\u2010sport\u2010specific subscale scores and lower likelihood of achieving minimal clinically important difference (adjusted odds ratio 0.19; 95% confidence interval 0.04\u20100.83;\n P<\/jats:italic>\n \u2009=\u2009.028).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n In this cohort, a high FII (>75\u00b0) was associated with significantly lower net patient\u2010reported outcome measure improvement in male patients.<\/jats:p>\n <\/jats:sec>\n \n Level of Evidence<\/jats:title>\n Level III, retrospective cohort study.<\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/arj.70525","type":"journal-article","created":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T11:39:05Z","timestamp":1789299545000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Femoral Impingement Index Predicts Inferior Clinical Outcomes in Men Undergoing Hip Arthroscopy for Femoroacetabular Impingement Syndrome"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4676-5634","authenticated-orcid":false,"given":"Ronak M.","family":"Patel","sequence":"first","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan S.","family":"Selley","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9306-7006","authenticated-orcid":false,"given":"Hayden P.","family":"Baker","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9360-2884","authenticated-orcid":false,"given":"Joost A.","family":"Burger","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew S.","family":"Dooley","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeremy","family":"Rinzler","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1363-4734","authenticated-orcid":false,"given":"Stephanie","family":"Buza","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bryan T.","family":"Kelly","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danyal H.","family":"Nawabi","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Surgery Service Hospital for Special Surgery New York New York 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impingement","volume":"48","author":"Domb BG","year":"2020","journal-title":"Am J Sports Med."},{"key":"e_1_2_9_27_1","doi-asserted-by":"crossref","first-page":"773","DOI":"10.1016\/j.arthro.2016.10.022","article-title":"Isolated acetabuloplasty and labral repair for combined\u2010type femoroacetabular impingement: Are we doing too much?","volume":"33","author":"Tjong VK","year":"2017","journal-title":"Arthroscopy."},{"key":"e_1_2_9_28_1","doi-asserted-by":"crossref","first-page":"2072","DOI":"10.1177\/0363546518780311","article-title":"The importance of comprehensive cam correction: Radiographic parameters are predictive of patient\u2010reported outcome measures at 2 years after hip arthroscopy","volume":"46","author":"Lansdown DA","year":"2018","journal-title":"Am J Sports Med."},{"key":"e_1_2_9_29_1","first-page":"1","volume-title":"Hip Arthroscopy and Hip Joint Preservation Surgery","author":"Kang 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A match\u2010controlled study","volume":"47","author":"Chaharbakhshi EO","year":"2019","journal-title":"Am J Sports Med."},{"key":"e_1_2_9_40_1","doi-asserted-by":"crossref","first-page":"2065","DOI":"10.1177\/0363546513494173","article-title":"Psychometric properties of patient\u2010reported outcome measures for hip arthroscopic surgery","volume":"41","author":"Kemp JL","year":"2013","journal-title":"Am J Sports Med."},{"key":"e_1_2_9_41_1","first-page":"778","article-title":"Etiology and severity of impingement injuries of the acetabular labrum: What is the role of femoral morphology?","volume":"35","author":"Dy CJ","year":"2012","journal-title":"Orthopedics."}],"container-title":["Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/arj.70525","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/arj.70525","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/arj.70525","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T11:39:15Z","timestamp":1789299555000},"score":1,"resource":{"primary":{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/10.1002\/arj.70525"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,13]]},"references-count":40,"alternative-id":["10.1002\/arj.70525"],"URL":"https:\/\/doi.org\/10.1002\/arj.70525","archive":["Portico"],"relation":{},"ISSN":["0749-8063","1526-3231"],"issn-type":[{"value":"0749-8063","type":"print"},{"value":"1526-3231","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,13]]},"assertion":[{"value":"2025-06-10","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-04-02","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-09-13","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"arj.70525"}}