Table 1.
Characteristics of knee arthroplasty patients and operative methods as registered in the NARA database, for the period 1997–2007
| Denmark | Norway | Sweden | |
|---|---|---|---|
| No. of knee arthroplasties | 38,411 | 26,451 | 86,952 |
| No. of hospitals | 52 | 82 | 99 |
| % females | 64 | 68 | 62 |
| % OA | 82 | 85 | 92 |
| % RA | 4.3 | 5.9 | 4.7 |
| % Other | 14 | 9 | 3.4 |
| TKA | 35,569 | 23.096 | 76.304 |
| % females | 64 | 70 | 63 |
| Mean age at TKA | 69 | 70 | 71 |
| Femur & tibia cemented | 78 | 86 | 98 |
| Femur & tibia uncemented | 7.7 | 1.8 | 1.2 |
| Femur & tibia hybrid | 14 | 12 | 0.4 |
| % TKA with patellar button | 76 | 11 | 14 |
| UKA | 2,481 | 3,297 | 10,157 |
| % females | 58 | 59 | 57 |
| Mean age at UKA | 63 | 65 | 66 |
| Femur & tibia cemented | 99 | 99 | 100 |
| Femur & tibia uncemented | 1.20 | 0 | |
| Femur & tibia hybrid | 0.2 | 0.5 | 0 |
| Medial UKA | 99 | 48 | 98 |
| Lateral UKA | 0.5 | 1.4 | 2.2 |
| Laterality unknown | 0 | 51 | 0 |
| Fem-Pat | 197 | 52 | 150 |
| % females | 69 | 71 | 77 |
| Mean age at femoro-patellar | 60 | 52 | 64 |
| Other or unknown type | 164 | 6 | 341 |