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Data Quality
Survival UKA
Knee » Survival UKA » UKA
FIGURE Cumulative revision percentage of unicondylar knee arthroplasties by type of revision in the Netherlands in 2007-2021 (n=38,992)
TABLE Cumulative revision percentages
| Number at risk (n) | Competing Risk¹ (95% CI) | Kaplan Meier (95% CI) | |
| Any type of revision | |||
| 1-year revision (%) | 44,179 | 1.9 (1.8-2.0) | 2.1 (2.0-2.3) |
| 3-year revision (%) | 31,057 | 5.3 (5.1-5.5) | 5.6 (5.3-5.9) |
| 5-year revision (%) | 20,833 | 7.2 (7.0-7.5) | 7.6 (7.3-7.9) |
| 10-year revision (%) | 7,451 | 11.4 (11.0-11.8) | 12.5 (11.9-13.0) |
| 13-year revision (%) | 2,688 | 13.1 (12.6-13.7) | 15.1 (14.3-15.8) |
| Major revision² | |||
| 1-year revision (%) | 44,484 | 1.2 (1.1-1.3) | 1.3 (1.2-1.4) |
| 3-year revision (%) | 31,453 | 4.0 (3.9-4.2) | 4.4 (4.2-4.6) |
| 5-year revision (%) | 21,136 | 5.7 (5.5-6.0) | 6.2 (5.9-6.5) |
| 10-year revision (%) | 7,584 | 9.6 (9.2-10.0) | 10.8 (10.3-11.3) |
| 13-year revision (%) | 2,728 | 11.3 (10.8-11.8) | 13.3 (12.6-14.0) |
| Minor revision³ | |||
| 1-year revision (%) | 44,697 | 0.8 (0.7-0.9) | 0.9 (0.8-1.0) |
| 3-year revision (%) | 32,485 | 1.4 (1.3-1.5) | 1.4 (1.3-1.5) |
| 5-year revision (%) | 22,421 | 1.7 (1.6-1.8) | 1.8 (1.6-1.9) |
| 10-year revision (%) | 8,577 | 2.1 (1.9-2.3) | 2.2 (2.0-2.3) |
| 13-year revision (%) | 3,073 | 2.3 (2.1-2.5) | 2.4 (2.1-2.6) |
¹ The cumulative revision percentage using the competing risk method is shown in the figure.
² First revision of the femur or tibia component, regardless of whether a minor revision has already taken place. Therefor, the first three revision procedures were reviewed.
³Only insert and/or patella exchange (including patella addition).
UKA: unicondylarl knee arthroplasty; CI: confidence interval.
© LROI 2022
In 2007-2021, 1,659 (4.3%) primary UKAs were implanted in patients who died within thirteen years after the primary diagnosis.
Knee » Survival UKA » UKA by fixation
FIGURE Cumulative revision percentage of unicondylar knee arthroplasties by fixation of revision in the Netherlands in 2007-2021 (n=37,657)
TABLE Cumulative 13-year revision percentage
| Cumulative 13-year revision percentage | |||
| Number (n) | Competing Risk1 (95% CI) | Kaplan Meier (95% CI) | |
| Fixation | |||
| Cemented | 22,004 | 15.5 (14.7-16.3) | 16.3 (15.4-17.1) |
| Uncemented | 15,653 | 10.5 (8.4-13.1) | 11.0 (8.5-13.5) |
¹ The cumulative revision percentage using the competing risk method is shown in the figure.
UKA: unicondylar knee arthroplasty; CI: confidence interval.
© LROI 2022
Knee » Survival UKA » UKA by component
Please note: this figure is not updated yet with procedure year 2021. This will be available soon.
TABLE Cumulative revision percentages of primary unicondylar knee arthroplasties by prosthesis component combination of patients who underwent a UKA for osteoarthritis in the Netherlands in 2007-2020 (n=34,632)
| Type of revision (n) | Cumulative revision percentage (95% CI) | |||||||||||||||
| Femur component | Tibia component | Total primary UKAs (n) | Median (IQR) age (yr) | Total RAs (n) | Total revision | Patella addition | Only femur | Only tibia | Only insert/ patella | Missing/ unknown | 1yr | 3yr | 5yr | 7yr | 10yr | 12yr |
| All UKAs for osteoarthritis | 34,632 | 63 (57-69) | 2,522 | 1,902 | 7 | 15 | 64 | 503 | 31 | 1.9 (1.8-2.1) | 5.7 (5.4-6.0) | 7.9 (7.5-8.2) | 9.9 (9.5-10.3) | 13.0 (12.4-13.6) | 14.9 (14.2-15.7) | |
| Oxford PKR Cemented | Oxford PKR Cemented | 13,716 | 63 (57-69) | 1,380 | 1,099 | 5 | 10 | 30 | 217 | 20 | 1.9 (1.7-2.1) | 6.2 (5.8-6.6) | 8.7 (8.2-9.2) | 10.7 (10.1-11.3) | 13.8 (13.0-14.5) | 15.7 (14.7-16.6) |
| Oxford PKR Uncemented | Oxford PKR Uncemented | 11,562 | 64 (58-70) | 448 | 231 | 0 | 2 | 15 | 196 | 5 | 2.0 (1.7-2.2) | 4.3 (3.9-4.7) | 5.2 (4.7-5.7) | 6.8 (5.9-7.7) | n.a. | n.a. |
| Physica Zimmer Unicompartmental High Flex Knee | Physica Zimmer Unicompartmental High Flex Knee | 2,811 | 62 (57-68) | 104 | 92 | 0 | 0 | 1 | 12 | 0 | 0.7 (0.4-1.1) | 3.3-(2.5-4.1) | 5.0 (3.8-6.1) | 7.1 (5.4-8.7) | 10.5 (8.0-13.0) | 11.5 (8.7-14.3) |
| Genesis Uni | Genesis Uni | 1,276 | 62 (56-69) | 204 | 192 | 1 | 0 | 2 | 6 | 3 | 2.7 (1.8-3.6) | 8.8 (7.2-10.3) | 12.4 (10.6-14.2) | 14.8 (12.8-16.8) | 17.6 (15.3-20.0) | 19.1 (16.5-21.8) |
| balanSys UNI | balanSys UNI | 450 | 61 (55-68) | 52 | 43 | 1 | 0 | 3 | 5 | 0 | 2.4 (0.9-3.9) | 9.7 (6.7-12.7) | 11.3 (8.0-14.5) | 12.4 (8.9-15.8) | 17.0 (12.2-21.8) | n.a. |
| Journey Uni | Journey Uni | 407 | 62 (56-69) | 23 | 19 | 0 | 2 | 1 | 0 | 1 | 1.6 (0.3-2.9) | 5.9 (3.2-8.6) | 8.8 (4.9-12.7) | n.a. | n.a. | n.a. |
| Oxford PKR Uncemented | Oxford PKR Cemented | 362 | 65 (56-72) | 18 | 9 | 0 | 0 | 0 | 9 | 0 | 2.9 (1.1-4.7) | 5.3 (2.7-7.8) | 6.9 (3.5-10.2) | n.a. | n.a. | n.a. |
| Triathlon | Triathlon | 197 | 70 (63-76) | 17 | 16 | 0 | 0 | 0 | 1 | 0 | 1.6 (0.0-3.3) | 6.6 (2.5-10.7) | 8.7 (3.8-13.5) | 11.1 (5.3-16.9) | n.a. | n.a. |
| Oxford PKR Cemented | Oxford PKR Uncemented | 181 | 66 (59-73) | 12 | 6 | 0 | 1 | 0 | 5 | 0 | 2.8 (0.4-5.3) | 7.8 (2.9-12.7) | n.a. | n.a. | n.a. | n.a. |
| HLS uni | HLS Uni | 171* | 58 (52-65) | 35 | 34 | 0 | 0 | 0 | 1 | 0 | 2.3 (0.1-4.6) | 8.8 (4.5-13.0) | 16.5 (10.9-22.0) | 19.4 (13.5-25.4) | 20.8 (14.7-27.0) | n.a. |
| Allegretto | Allegretto | 108* | 57 (51-65) | 18 | 15 | 0 | 0 | 3 | 0 | 0 | 6.5 (1.8-11.1) | 12.2 (6.0-18.4) | 17.0 (9.5-24.5) | n.a. | n.a. | n.a. |
Please note: n.a. if <50 cases were at risk; UKA: unicondylar knee arthroplasty; CI: confidence interval; IQR: interquartile range.
© LROI 2021
Only combinations with over 100 procedures have been listed.
Results must be interpreted with caution. Patient characteristics like age and diagnosis, as well as procedure characteristics like the experience of the surgeon performing the procedure, femoral head size and articulation of the prosthesis may have influenced the cumulative revision percentages.
Knee » Survival UKA » UKA by pre-PROM