{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,26]],"date-time":"2026-05-26T11:04:44Z","timestamp":1779793484987,"version":"3.53.1"},"reference-count":21,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T00:00:00Z","timestamp":1772668800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T00:00:00Z","timestamp":1772668800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100011594","name":"Sophies Minde Ortopedi","doi-asserted-by":"publisher","award":["2019-03"],"award-info":[{"award-number":["2019-03"]}],"id":[{"id":"10.13039\/501100011594","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["HIP International"],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Residual deformities after Perthes disease, such as high-rising greater trochanter (HGT) and reduced femoral offset (FO), may compromise abductor function and influence long-term hip function.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To determine the prevalence of HGT and abnormal FO in young adults with healed unilateral Perthes disease and evaluate their associations with the Stulberg classification and hip function.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>In this cross-sectional follow-up study, 180 individuals (mean age 28.2\u2009years, 72% male) previously diagnosed with unilateral Perthes disease were examined with radiographs and clinical tests. Articulo-trochanteric distance (ATD) and FO were measured on calibrated pelvic radiographs. Femoral head shape was classified using a modified 3-group Stulberg classification. Hip function was evaluated using the Trendelenburg test, passive hip abduction range of motion, and the Copenhagen Hip and Groin Outcome Score (HAGOS).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      ATD was significantly lower in Perthes hips compared to contralateral hips (7.7\u2009mm [SD 9.6] vs. 20.7\u2009mm [SD 6.2],\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001). HGT was present in 70 individuals (39%), and a positive Trendelenburg test was observed in 12 Perthes hips (7%). Risk factors for a positive test included hip pain, aspherical femoral head, and surgical treatment. Mean FO was lower in Perthes hips (34.2\u2009mm vs. 39.7\u2009mm,\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001), as was hip abduction (25.5\u00b0 vs. 29.7\u00b0). ATD and FO were significantly associated with the modified Stulberg classification, particularly between Stulberg 1 and Stulberg 3 hips (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001). No significant associations were found between ATD, FO, and hip function parameters, nor between HGT and HAGOS scores in spherical hips.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Reduced ATD and FO were prevalent in young adults with previous PD and were associated with the modified Stulberg classification but not with hip function.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical trials registration:<\/jats:title>\n                    <jats:p>ClinicalTrials.gov (NCT03995960).<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/11207000261420153","type":"journal-article","created":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T10:47:50Z","timestamp":1773226070000},"page":"493-499","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["The influence of extra-articular changes on hip function in young adults with a history of Perthes disease"],"prefix":"10.1177","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-2765-5736","authenticated-orcid":false,"given":"Johan Olav","family":"Brevik","sequence":"first","affiliation":[{"name":"Section of Orthopaedic Rehabilitation, Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8210-0360","authenticated-orcid":false,"given":"Kristine","family":"Risum","sequence":"additional","affiliation":[{"name":"Section of Orthopaedic Rehabilitation, Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway"},{"name":"Department of Rehabilitation Science and Health Technology, Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Armend","family":"Fejzulai","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, Oestfold Hospital Trust, \u00d8stfold, Norway"},{"name":"University of Oslo Institute for Clinical Medicine, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0252-7941","authenticated-orcid":false,"given":"Terje","family":"Terjesen","sequence":"additional","affiliation":[{"name":"University of Oslo Institute for Clinical Medicine, Oslo, Norway"},{"name":"Section of Children's Orthopaedics and Reconstructive Surgery, Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ola","family":"Wiig","sequence":"additional","affiliation":[{"name":"Section of Children's Orthopaedics and Reconstructive Surgery, Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8681-6866","authenticated-orcid":false,"given":"Stefan","family":"Huhnstock","sequence":"additional","affiliation":[{"name":"Section of Children's Orthopaedics and Reconstructive Surgery, Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,3,5]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.90B10.20649"},{"key":"e_1_3_3_3_2","first-page":"1","article-title":"Coxa plana. A clinical and radiological investigation with particular reference to the importance of the metaphyseal changes for the final shape of the proximal part of the femur","author":"Edgren W","year":"1965","unstructured":"Edgren W. Coxa plana. A clinical and radiological investigation with particular reference to the importance of the metaphyseal changes for the final shape of the proximal part of the femur. Acta Orthop Scand Suppl 1965; (Suppl. 84): 1\u2013129.","journal-title":"Acta Orthop Scand Suppl"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ocl.2011.05.002"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199101000-00025"},{"key":"e_1_3_3_6_2","first-page":"309","article-title":"Epiphysiodesis of the greater trochanter in Legg-Calve-Perthes disease: the importance of timing","volume":"72","author":"Van Tongel A","year":"2006","unstructured":"Van Tongel A, Fabry G. Epiphysiodesis of the greater trochanter in Legg-Calve-Perthes disease: the importance of timing. 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