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British volume"],"published-print":{"date-parts":[[2005,9]]},"abstract":"<jats:p>Of the 34 723 infants born between 1 June 1992 and 31 May 2002, the hips of 2578 with clinical instability or at-risk factors for developmental dysplasia of the hip were imaged by ultrasound.<\/jats:p><jats:p>Instability of the hip was present in 77 patients, of whom only 24 (31.2%) had an associated risk factor. From the \u2018at-risk\u2019 groups, the overall risk of type-III dysplasia, instability and irreducibility was 1:15 when family history, 1:27 when breech delivery and 1:33 when foot deformity were considered as risk factors. Of those hips which were ultrasonographically stable, 88 had type-III dysplasia.<\/jats:p><jats:p>A national programme of selective ultrasound screening of at-risk factors for the diagnosis of hip dislocation or instability alone cannot be recommended because of its low predictive value (1:88). However, the incidence of type-III dysplasia and hip dislocation or dislocatability in the groups with clinical instability, family history, breech position and possibly postural foot deformity as risk factors could justify a programme of selective ultrasound imaging.<\/jats:p>","DOI":"10.1302\/0301-620x.87b9.16565","type":"journal-article","created":{"date-parts":[[2005,8,29]],"date-time":"2005-08-29T18:07:45Z","timestamp":1125338865000},"page":"1264-1266","source":"Crossref","is-referenced-by-count":81,"title":["The significance of at-risk factors in ultrasound surveillance of developmental dysplasia of the hip"],"prefix":"10.1302","volume":"87-B","author":[{"given":"R. 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