{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T12:14:35Z","timestamp":1771503275773,"version":"3.50.1"},"reference-count":22,"publisher":"Georg Thieme Verlag KG","issue":"S 01","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am J Perinatol"],"published-print":{"date-parts":[[2024,5]]},"abstract":"<jats:p>\n            Objectives\u2003The aim of the study is to (1) determine the incidence of developmental dysplasia of the hip (DDH) in preterm infants born prior to 35 completed weeks' gestation in a breech presentation, and (2) evaluate if the association between breech presentation and DDH in full-term infants holds for premature infants.<\/jats:p><jats:p>\n            Study Design\u2003This study design comprises retrospective review of infants born between January 1, 2008, and December 31, 2017, at &lt;35 weeks' gestation and admitted to the NICU. Infants had hip ultrasounds at 4 to 6 weeks' corrected age if they were born in a breech presentation with a stable hip examination. We excluded infants born in a presentation other than breech or vertex, had no documentation of presentation at birth, or if they died within the first year.<\/jats:p><jats:p>\n            Results\u2003We included 1,533 infants. Preterm infants &lt;35 weeks' gestation born in the breech versus vertex position had an incidence of DDH of 0.47% (2\/428) and 0.36% (4\/1,105), respectively. There was no significant difference in the incidence of DDH between infants born in the breech versus vertex position (Chi-square and Fisher's exact tests). The sensitivity, specificity, and positive and negative predictive values of breech presentation in detecting DDH were 33, 72, 0.47, and 99.6%, respectively.<\/jats:p><jats:p>\n            Conclusion\u2003There is no association between breech presentation and DDH in preterm infants &lt;35 weeks' gestation. Obtaining hip ultrasounds on preterm infants &lt;35 weeks' gestation born in the breech presentation with a normal hip examination is not recommended.<\/jats:p><jats:p>\n            Key Points\n          <\/jats:p>","DOI":"10.1055\/s-0042-1756139","type":"journal-article","created":{"date-parts":[[2022,9,12]],"date-time":"2022-09-12T22:39:21Z","timestamp":1663022361000},"page":"e465-e469","source":"Crossref","is-referenced-by-count":5,"special_numbering":"S","title":["Developmental Dysplasia of the Hip Is Not Associated with Breech Presentation in Preterm Infants"],"prefix":"10.1055","volume":"41","author":[{"given":"Samantha P.","family":"Leonard","sequence":"additional","affiliation":[{"name":"Division of Neonatal-Perinatal Medicine, Department of Pediatrics, Penn State Health Children's Hospital, Hershey, Pennsylvania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9930-4888","authenticated-orcid":false,"given":"Mitchell J.","family":"Kresch","sequence":"additional","affiliation":[{"name":"Division of Neonatal-Perinatal Medicine, Department of Pediatrics, Penn State Health Children's Hospital, Hershey, Pennsylvania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2022,9,12]]},"reference":[{"issue":"06","key":"ref1","doi-asserted-by":"crossref","first-page":"e20163107","DOI":"10.1542\/peds.2016-3107","article-title":"Section on Orthopaedics. 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