Browsing by Subject "Developmental hip dysplasia"

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    The demographics of developmental hip dysplasia in the Midwestern United States (Indiana)
    (Springer Berlin Heidelberg, 2015-02) Loder, Randall T.; Shafer, Cody; Department of Orthopaedic Surgery, IU School of Medicine
    Background Today’s society is much more mobile than in the past. This increased mobility has resulted in different marriage/parenting groups. We wished to study the de- mographics of developmental dysplasia of the hip (DDH) in our area and compare/contrast our findings with those in the literature and specifically look for new findings com- pared to previous studies. Methods A retrospective review of all children with DDH from 2003 through 2012 was performed. The age at first visit, gestational age, pregnancy number, gender, race, and family history of DDH was collected. Statistical sig- nificance was a p -value < 0.05. Results There were 424 children (363 girls, 61 boys). Ethnicity was White in 80.8 %, Hispanic in 13.8 %, Black in 4.0 %, and Indo-Malay and Indo-Mediterranean in 0.7 % each; 66.8 % were unilateral; 14.2 % had a positive family history. The average gestational age was 38.1 weeks; 94.4 % were full term. The child was vertex presentation in 67.6 % and breech in 32.4 %; 52.8 % were delivered vaginally and 47.2 % by Cesarean section. The child was the first-born in 48.3 %. When compared to the birth statistics of our state, there was a higher proportion of Whites and Hispanics with DDH, and a lower, but not inconsequential, proportion of Blacks ( p = 0.0018). Conclusion Mixing of gene pools and infant carrying methods (lack of swaddling or marked abduction) occurring with societal change likely explains the higher than expected proportion of DDH amongst those of His- panic ethnicity and a lower than expected, but not rare, proportion in those of African ancestry. Level of evidence Level IV—retrospective case series.
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    Seasonal variation in adult hip disease secondary to osteoarthritis and developmental dysplasia of the hip
    (Baishideng Publishing Group, 2016-12-18) Sueyoshi, Tatsuya; Ritter, Merrill A.; Davis, Kenneth E.; Loder, Randall T.; Department of Orthopaedic Surgery, IU School of Medicine
    AIM: To determine if there was a seasonal variation in adults undergoing total hip arthroplasty for end stage hip disease due to osteoarthritis (OA) or sequelae of developmental dysplasia of the hip (DDH). METHODS: The total hip registry from the author's institution for the years 1969 to 2013 was reviewed. The month of birth, age, gender, and ethnicity was recorded. Differences between number of births observed and expected in the winter months (October through February) and non-winter mo (March through September) were analyzed with the χ2 test. Detailed temporal variation was mathematically assessed using cosinor analysis. RESULTS: There were 7792 OA patients and 60 DDH patients who underwent total hip arthroplasty. There were more births than expected in the winter months for both the DDH (P < 0.0001) and OA (P = 0.0052) groups. Cosinor analyses demonstrated a peak date of birth on 1st October. CONCLUSION: These data demonstrate an increased prevalence of DDH and OA in those patients born in winter.