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Table 2 Incidence of revision total knee arthroplasty according to hospital and prosthesis manufacturer volume

From: Factors associated with the incidence of revision total knee arthroplasty in Korea between 2007 and 2012: an analysis of the National Claim Registry

   Study cohort (n = 260,068)
Factor Volume Number of patients (%) Incidence rate (per 100,000 person-years)
Hospitala <20 19,335 (7.4) 536.9
20–199 99,797 (38.4) 432.3
≥200 140,936 (54.2) 300.1
Manufacturerb <1,500 8,746 (3.4) 772.3
1500–3999 30,153 (11.6) 453.9
≥4000 221,169 (85.0) 345.6
  1. aMean annual number of primary total knee arthroplasties performed in each hospital during the study period
  2. bMean annual number of prostheses applied to patients undergoing primary total knee arthroplasty during the study period
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