Table 2.
Incidence of revision total knee arthroplasty according to hospital and prosthesis manufacturer volume
| 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 | |
aMean annual number of primary total knee arthroplasties performed in each hospital during the study period
bMean annual number of prostheses applied to patients undergoing primary total knee arthroplasty during the study period