Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 24285
LOW VALIDITY OF THE CHARNLEY CLASSIFICATION USED AS A
COMORBIDITY INDEX
Kristian BJORGUL 1 , Wendy M NOVICOFF 1 , Sven Ture ANDERSEN 2 , Knut
BREVIG 1 , Einer Mogens WIIG 3 , Ola ÅHLUND 1
1 2
Department of Orthopaedic Surgery, Fredrikstad (NORWAY), COXA
Ortopedikonsult, Halden (NORWAY), 3 Fredrikshald Klinikk, Halden (NORWAY)
The Charnley classification is based on the status of the contralateral hip as well as
the presence of significant comorbid diseases. This implies that the status of other
major joints as well as the presence of comorbidities modulates outcome after total
hip arthroplasty. In this study, we investigated whether the preoperative status of
other major joints and comorbidities influenced outcome as measured by Harris Hip
Score (HHS). Methods and material: 215 patients were treated with total hip
arthroplasty in a prospective trial. Preoperatively we obtained information on the
status of the contralateral hip, both knees and spine, which were classified as healthy
or diseased. We also noted the presence of comorbid disease. We performed a
linear regression analysis and included age, gender and preoperative Body Mass
Index as variables. Results: Age and the presence of comorbid diseases significantly
predicted Harris Hip Score at six months, two years, five years and ten years. Joint
condition did not predict HHS at any time point. Conclusion: The condition of other
major joints does not influence outcome after total hip arthroplasty in the short or long
run. The Charnley classification should be replaced by a reliable and valid
comorbidity index.
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