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Higher rate of revision TKA found in low volume hospitals
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Compared with high volume hospitals, low volume hospitals had a significantly higher rate of revision total knee arthroplasties, according to the results of a study that used data from the Norwegian Arthroplasty Register.
According to the study abstract, the investigators studied 37,381 total knee arthroplasties (TKAs) reported to the Norwegian Arthroplasty Register between 1994 and 2010. They used the data to examine the annual procedure volume per hospital, and grouped the centers into one of the following categories: low volume (one to 24 TKAs), medium volume (25 to 49 TKAs), medium volume (50 to 99 TKAs), high volume (100 to 149 TKAs) and high volume (more than 150 TKAs). They used Cox regression adjusted for age, sex and diagnosis to estimate the proportion of procedures without revision and the risk ratio of revision.
The investigators found a prosthetic survival rate of 92.5% at 10 years for the lowest volume hospitals vs. a 95.5% rate for the highest volume centers. Compared with hospitals with an annual volume of one to 24 procedures, researchers found a significantly lower risk of revision for hospitals with an annual volume of 100 to 149 procedures and those with 150 or more procedures.
Disclosure: The researchers report no relevant financial disclosures.
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