Figure 1.
Figure 2.
Figure 3.
Figure 4.
Demographics of patients in 2019 and 2020_
| Type of operation | Gender | 2019 | 2020 | ||||
|---|---|---|---|---|---|---|---|
| N° | % | Age at operation (±SD) | N° | % | Age at operation (±SD) | ||
| Primary THR | Male | 1610 | 46% | 66.64 (±10.26) | 1269 | 45% | 66.14 (±10.87) |
| Female | 1920 | 54% | 69.18 (±10.24) | 1523 | 55% | 69.71 (±10.50) | |
| Primary Total and Partial KR | Male | 1157 | 36% | 67.80 (±8.54) | 929 | 38% | 67.97 (±8.84) |
| Female | 2034 | 64% | 70.12 (±8.38) | 1494 | 62% | 70.19 (±8.67) | |
| Revision HR | Male | 168 | 48% | 69.28 (±11.13) | 123 | 39% | 69.84 (±11.99) |
| Female | 184 | 52% | 73.99 (±9.23) | 194 | 61% | 75.03 (±10.52) | |
| Revision KR | Male | 84 | 39% | 68.13 (±9.74) | 65 | 41% | 68.40 (±7.84) |
| Female | 129 | 61% | 69.83 (±10.01) | 94 | 59% | 71.53 (±8.80) | |
| Sum of THR and KR | Male | 3019 | 41% | 67.96 (±9.92) | 2386 | 42% | 68.09 (±9.89) |
| Female | 4267 | 59% | 70.78 (±9.47) | 3305 | 58% | 71.62 (±9.62) |
Reasons for revision for hip and knee replacements_
| Reason for revision | Hips | Knees | ||||
|---|---|---|---|---|---|---|
| 2019 | 2020 | x2df(1) | 2019 | 2020 | x2df(1) | |
| N° | N° | p-value | N° | N° | p-value | |
| 2-stage revision | 20 | 22 | 0.503 | 22 | 21 | 0.390 |
| Aseptic loosening | 117 | 99 | 0.579 | 34 | 32 | 0.298 |
| Deep infection | 42 | 48 | 0.224 | 82 | 50 | 0.160 |
| Dislocation | 37 | 21 | 0.074 | 0 | 0 | NA |
| Broken Implant | 12 | 9 | 0.673 | 0 | 0 | NA |
| Malalignment | 0 | 0 | NA | 21 | 21 | 0.313 |
| Other | 41 | 28 | 0.232 | 29 | 19 | 0.636 |
| Pain | 10 | 27 | 0.001 | 20 | 6 | 0.036 |
| Periprosthetic fracture | 73 | 63 | 0.781 | 5 | 10 | 0.056 |
| Chi-square test | x2df(7) p=0.025 | x2df(6) p=0.073 | ||||
90-day mortality after primary and revision HR and KR_
| Type of operation | 2019 | 2020 | x2df(1) | ||||
|---|---|---|---|---|---|---|---|
| N° of operations | N° of deaths in 90-days | % of deaths | N° of operations | N° of deaths in 90-days | % of deaths | p-value | |
| Primary THR | 3691 | 15 | 0.4 | 3436 | 14 | 0.4 | 0.994 |
| Primary Total and Partial KR | 3191 | 4 | 0.1 | 2423 | 8 | 0.3 | 0.100 |
| Revision HR | 352 | 11 | 3.1 | 317 | 14 | 4.4 | 0.379 |
| Revision KR | 213 | 5 | 2.4 | 159 | 2 | 1.3 | 0.444 |
| x2df(3) | p=0.408 |