Early Results of Total Hip Arthroplasty in Patients With Developmental Dysplasia of the Hip Compared With Patients With Osteoarthritis
Section snippets
Materials and Methods
After institutional review board approval, data covering the period of January 1, 1999, to December 31, 2008, were obtained from the New Zealand National Joint Registry. Registry records of all patients who underwent primary THA during this time with the principal diagnosis recorded as DDH were analyzed. A reference group was generated from registry data including all patients who underwent primary THA during the study period with the principal diagnosis recorded as OA.
The DDH group was
Results
We identified 1205 primary THAs with the principal diagnosis of DDH and 40 589 primary THAs with the principal diagnosis of OA from New Zealand National Joint Registry records covering the 10-year study period.
Discussion
In this nationwide registry-based cohort study of 1205 patients with DDH undergoing primary THA, we found no difference in functional outcome and revision rate to a comparison population of 40 589 patients with OA undergoing primary THA. To our knowledge, this study reports the largest comparative series of THA in patients with DDH with functional postoperative outcome data. Previous large studies 8, 11 have been published, although these do not report functional outcome data.
Acknowledgments
The authors thank Mrs Toni Hobbs and the staff of the New Zealand Joint Registry for their kind assistance.
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The Conflict of Interest statement associated with this article can be found at doi:10.1016/j.arth.2011.06.024.