{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T23:58:20Z","timestamp":1777507100277,"version":"3.51.4"},"reference-count":26,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2022,6,26]],"date-time":"2022-06-26T00:00:00Z","timestamp":1656201600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Acta Radiol"],"published-print":{"date-parts":[[2023,3]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>A new, supposedly more reproducible radiographic classification, set to replace the T\u00f6nnis classification of hip dislocations, was proposed in 2015: the International Hip Dysplasia Institute (IHDI) classification.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To compare the IHDI classification with the T\u00f6nnis classification when evaluating the severity of hip dislocations as well as their respective inter- and intra-observer reliability.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and Methods<\/jats:title>\n                    <jats:p>Since January 2000, Swedish-born children with a hip dislocation were prospectively registered. From this registry, radiographs of 97 hips in 79 patients (91% girls; median age = 7 months), born in 2000\u20132009, were analyzed. Two observers, one consultant and one resident, classified each hip both by IHDI and T\u00f6nnis twice.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The IHDI classification had a more even distribution of grades with the majority in grade 2\u20133. The T\u00f6nnis classification graded the majority (77%) of the patients as grade 2 and equally among the other grades. There was moderate inter-observer agreement using both methods calculated with Kappa, 0.61 (95% confidence interval [CI] = 0.44\u20130.79) for T\u00f6nnis and 0.62 (95% CI = 0.49\u20130.74) for IHDI. The resident calculated T\u00f6nnis with weak intra-observer reliability of 0.57 (95% CI = 0.40\u20130.74) compared to high intra-observer reliability of 0.86 (95% CI = 0.74\u20130.98) for the consultant. Both observers graded IHDI with high intra-observer reliability.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>IHDI is more discriminative than the T\u00f6nnis classification when evaluating the severity of a hip dislocation in infants.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/02841851221110447","type":"journal-article","created":{"date-parts":[[2022,6,27]],"date-time":"2022-06-27T02:41:05Z","timestamp":1656297665000},"page":"1103-1108","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["The International Hip Dysplasia Institute (IHDI) classification is more informative than the T\u00f6nnis classification"],"prefix":"10.1177","volume":"64","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2857-5028","authenticated-orcid":false,"given":"Adam","family":"Sand","sequence":"first","affiliation":[{"name":"Department of Orthopaedics, Lund University, Sk\u00e5ne University Hospital, Malmo, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carl Johan","family":"Tiderius","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Lund University, Sk\u00e5ne University Hospital, Malmo, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henrik","family":"D\u00fcppe","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Lund University, Sk\u00e5ne University Hospital, Malmo, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8194-2432","authenticated-orcid":false,"given":"Daniel","family":"Wenger","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Lund University, Sk\u00e5ne University Hospital, Malmo, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2022,6,26]]},"reference":[{"key":"bibr1-02841851221110447","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.44B2.292"},{"key":"bibr2-02841851221110447","first-page":"6","volume":"119","author":"Ortolani M","year":"1976","journal-title":"Clin Orthop Relat 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