{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T02:41:13Z","timestamp":1776393673156,"version":"3.51.2"},"reference-count":19,"publisher":"MJS Publishing, Medical Journals Sweden AB","license":[{"start":{"date-parts":[[2026,1,3]],"date-time":"2026-01-03T00:00:00Z","timestamp":1767398400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ActaO"],"abstract":"<jats:p>Background and purpose: Developmental dysplasia of the hip (DDH) affects around 1.5% of newborns in Sweden with few late detected cases (0.12 per 10,000). The most common treatment for DDH in Sweden is with the von Rosen splint, with radiographs at 3 and 12 months of age. Little is known about the remodeling of acetabular dysplasia following treatment initiated in the neonatal period. We aimed to examine the correlation between the acetabular index (AI) at 3 and 12 months.Methods:\u00a0We included 228 patients with early detected DDH with dislocatable hips (Barlow) and dislocated hips (Ortolani), treated with the von Rosen splint at Sk\u00e5ne University Hospital 2003\u20132019. The treatment length was 6 weeks for 96 children and 12 weeks for 132 children. We calculated the correlation between AI at 3 and 12 months using Pearson correlation (r) and the mean difference, both with 95% confidence intervals (CI).Results:\u00a0The correlation between AI at 3 and 12 months was moderate, r = 0.43 (95% confidence interval [CI] 0.35\u20130.50), with changes in AI that differed widely. The mean AI was 23.9\u00b0 (CI 23.5\u201324.3) at 3 months and 24.9\u00b0 (CI 24.6\u201325.3) at 12 months with a difference of 1.0\u00b0 (CI 0.6\u20131.3).Conclusion:\u00a0The correlation between AI at 3 and 12 months was moderate, with non-clinical difference for both 6 and 12 weeks of treatment. The small increase in mean AI was most likely explained by a low AI at 3 months after 12 weeks of treatment.<\/jats:p>","DOI":"10.2340\/17453674.2025.45043","type":"journal-article","created":{"date-parts":[[2026,1,3]],"date-time":"2026-01-03T10:50:00Z","timestamp":1767437400000},"source":"Crossref","is-referenced-by-count":2,"title":["Correlation between acetabular index at 3 and 12 months of age: a longitudinal radiographic study of 228 neonates treated for 6 or 12 weeks with the von Rosen splint for developmental dysplasia of the hip"],"prefix":"10.2340","volume":"97","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2857-5028","authenticated-orcid":false,"given":"Adam","family":"Sand","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8194-2432","authenticated-orcid":false,"given":"Daniel","family":"Wenger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henrik","family":"D\u00fcppe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7717-1578","authenticated-orcid":false,"given":"Carl Johan","family":"Tiderius","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1183","published-online":{"date-parts":[[2026,1,3]]},"reference":[{"key":"137501","doi-asserted-by":"crossref","unstructured":"D\u00fcppe H, Danielsson L G. Screening of neonatal instability and of developmental dislocation of the hip: a survey of 132,601 living newborn infants between 1956 and 1999. J Bone Joint Surg Br 2002; 84(6): 878-85. doi: 10.1302\/0301-620x.84b6.12326.","DOI":"10.1302\/0301-620X.84B6.0840878"},{"key":"137502","doi-asserted-by":"crossref","unstructured":"Wenger D, D\u00fcppe H, Nilsson J \u00c5, Tiderius C J. Incidence of late-diagnosed hip dislocation after universal clinical screening in Sweden. JAMA Open 2019; 2(11): e1914779. doi: 10.1001\/jamanetworkopen.2019.14779.","DOI":"10.1001\/jamanetworkopen.2019.14779"},{"key":"137503","doi-asserted-by":"crossref","unstructured":"Graf R. Fundamentals of sonographic diagnosis of infant hip dysplasia. J Pediatr Orthop 1984; 4(6): 735-40. doi: 10.1097\/01241398-198411000-00015.","DOI":"10.1097\/01241398-198411000-00015"},{"key":"137504","doi-asserted-by":"crossref","unstructured":"Wenger D, D\u00fcppe H, Tiderius C J. Acetabular dysplasia at the age of 1 year in children with neonatal instability of the hip. Acta Orthop 2013; 84(5): 483-8. doi: 10.3109\/17453674.2013.850009.","DOI":"10.3109\/17453674.2013.850009"},{"key":"137505","doi-asserted-by":"crossref","unstructured":"Sand A, Tiderius C J, D\u00fcppe H, Wenger D. 6 compared with 12 weeks treatment in the von Rosen splint is sufficient for Barlow and Ortolani positive hips: a comparative study of 237 neonates. Acta Orthop 2023; 94: 295-9. doi: 10.2340\/17453674.2023.13649.","DOI":"10.2340\/17453674.2023.13649"},{"key":"137506","doi-asserted-by":"crossref","unstructured":"Wenger D, Samuelsson H, D\u00fcppe H, Tiderius C J. Early treatment with the von Rosen splint for neonatal instability of the hip is safe regarding avascular necrosis of the femoral head: 229 consecutive children observed for 6.5 years. Acta Orthop 2016; 87(2): 169-75. doi: 10.3109\/17453674.2015.1126158.","DOI":"10.3109\/17453674.2015.1126158"},{"key":"137507","doi-asserted-by":"crossref","unstructured":"Von Rosen S. Early diagnosis and treatment of congenital dislocation of the hip joint. Acta Orthop Scand 1956; 26(2): 136-55.","DOI":"10.1080\/00016470.1956.11978730"},{"key":"137508","doi-asserted-by":"crossref","unstructured":"Dahlstr\u00f6m H, Oberg L, Friberg S. Sonography in congenital dislocation of the hip. Acta Orthop Scand 1986; 57(5): 402-6. doi: 10.3109\/17453678609014757.","DOI":"10.3109\/17453678609014757"},{"key":"137509","doi-asserted-by":"crossref","unstructured":"T\u00f6nnis D. Congenital dysplasia and dislocation of the hip in children and adults. Berlin: Springer-Verlag; 1987.","DOI":"10.1007\/978-3-642-71038-4"},{"key":"137510","doi-asserted-by":"crossref","unstructured":"Schober P, Boer C, Schwarte L A. Correlation coefficients: appropriate use and interpretation. Anesth Analg 2018; 126(5): 1763-8. doi: 10.1213\/ANE.0000000000002864.","DOI":"10.1213\/ANE.0000000000002864"},{"key":"137511","doi-asserted-by":"crossref","unstructured":"Koo T K, Li M Y. A guideline of selecting and reporting intraclass correlation coefficients for reliability research. J Chiropr Med 2016; 15(2): 155-63. doi: 10.1016\/j.jcm.2016.02.012.","DOI":"10.1016\/j.jcm.2016.02.012"},{"key":"137512","doi-asserted-by":"crossref","unstructured":"Sari A S, Karakus O, Gultekin M Z, Senaran H. Acetabular index and acetabular depth ratio in newborns and infants aged 6 months or less with the healthy development of hips: a retrospective cross-sectional study. Medicine (Baltimore) 2023; 102(16): e33631. doi: 10.1097\/MD.0000000000033631.","DOI":"10.1097\/MD.0000000000033631"},{"key":"137513","doi-asserted-by":"crossref","unstructured":"Yasin M S, Al Karmi J, Suleiman D O, Raja Y M, Alshrouf M A, Abu Halaweh A, et al. Acetabular index as an indicator of Pavlik harness success in grade I developmental dysplasia of the hip: a retrospective study. J Child Orthop 2023; 17(6): 598-606. doi: 10.1177\/18632521231199519.","DOI":"10.1177\/18632521231199519"},{"key":"137514","unstructured":"Paediatric Orthopaedic Quality Registry (SPOQ) [Internet] [cited 2025 Nov 16]. Avaliable from: https:\/\/spoq.registercentrum.se\/"},{"key":"137515","doi-asserted-by":"crossref","unstructured":"Broadhurst C, Rhodes A M L, Harper P, Perry D C, Clarke N M P, Aarvold A. What is the incidence of late detection of developmental dysplasia of the hip in England?: a 26-year national study of children diagnosed after the age of one. Bone Joint J 2019; 101-b(3): 281-7. doi: 10.1302\/0301-620X.101B3.BJJ-2018-1331.R1.","DOI":"10.1302\/0301-620X.101B3.BJJ-2018-1331.R1"},{"key":"137516","doi-asserted-by":"crossref","unstructured":"Thallinger C, Pospischill R, Ganger R, Radler C, Krall C, Grill F. Long-term results of a nationwide general ultrasound screening system for developmental disorders of the hip: the Austrian hip screening program. J Child Orthop 2014; 8(1): 3-10. doi: 10.1007\/s11832-014-0555-6.","DOI":"10.1007\/s11832-014-0555-6"},{"key":"137517","doi-asserted-by":"crossref","unstructured":"von Kries R, Ihme N, Oberle D, Lorani A, Stark R, Altenhofen L, et al. Effect of ultrasound screening on the rate of first operative procedures for developmental hip dysplasia in Germany. Lancet 2003; 362(9399): 1883-7. doi: 10.1016\/S0140-6736(03)14957-4.","DOI":"10.1016\/S0140-6736(03)14957-4"},{"key":"137518","doi-asserted-by":"crossref","unstructured":"Sherman B, Lalonde F D, Schlechter J A. Measuring the acetabular index: an accurate and reliable alternative method of measurement. Am J Roentgenol 2021; 217(1): 172-6. doi: 10.2214\/AJR.20.23358.","DOI":"10.2214\/AJR.20.23358"},{"key":"137519","doi-asserted-by":"crossref","unstructured":"Boniforti F G, Fujii G, Angliss R D, Benson M K. The reliability of measurements of pelvic radiographs in infants. J Bone Joint Surg Br 1997; 79(4): 570-5. doi: 10.1302\/0301-620x.79b4.7238.","DOI":"10.1302\/0301-620X.79B4.0790570"}],"container-title":["Acta Orthopaedica"],"original-title":[],"link":[{"URL":"https:\/\/actaorthop.org\/actao\/article\/download\/45043\/52356","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/actaorthop.org\/actao\/article\/download\/45043\/52379","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/actaorthop.org\/actao\/article\/download\/45043\/52380","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/actaorthop.org\/actao\/article\/download\/45043\/52356","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,3]],"date-time":"2026-01-03T10:50:05Z","timestamp":1767437405000},"score":1,"resource":{"primary":{"URL":"https:\/\/actaorthop.org\/actao\/article\/view\/45043"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,1,3]]},"references-count":19,"URL":"https:\/\/doi.org\/10.2340\/17453674.2025.45043","relation":{},"ISSN":["1745-3682","1745-3674"],"issn-type":[{"value":"1745-3682","type":"electronic"},{"value":"1745-3674","type":"print"}],"subject":[],"published":{"date-parts":[[2026,1,3]]}}}