Revision within 1 and 3 years

Knee » Survival » Revision within 1 and 3 years » By type of revision

TABLE Cumulative 1-year and 3-years revision percentage of primary total knee arthroplasties by type of revision in the Netherlands in 2012-2016 (n=117,040)

Cumulative 1-year revision percentage Cumulative 3-years revision percentage
  Competing Risk (95% CI) Kaplan Meier (95% CI) Competing Risk (95% CI) Kaplan Meier (95% CI)
Any type of revision¹ 1.1 (1.0-1.1) 1.0 (0.9-1.0) 3.5 (3.4-3.6) 3.5 (3.4-3.6)
   Major revision² 0.4 (0.4-0.5) 0.4 (0.4-0.4) 1.6 (1.5-1.7) 1.6 (1.5-1.7)
   Minor revision³ 0.6 (0.6-0.7) 0.5 (0.5-0.6) 1.8 (1.8-1.9) 1.8 (1.8-1.9)

¹ Any type of revision includes minor and major revisions as well as revision procedures that could not be classified as minor or major revision.
² Revision of at least the femur or tibia component.
³ Only insert and/or patella exchange (including patella addition).
CI: confidence interval.

© LROI 2020

In 2012-2016, 3,459 (3.0%) primary TKAs were implanted in patients who died within three year after the primary procedure.

Knee » Survival » Revision within 1 and 3 years » Overall revision per hospital

FIGURE Funnel plot of proportion of knee revision arthroplasties within three years after a total knee arthroplasty per hospital in the Netherlands in 2012-2016 (n=115,987)

K47afbeelding.png

Please note: The proportion of revisions within 3 years per hospital were adjusted for casemix factors age, gender, ASA score and diagnosis (osteoarthritis versus other).

TKA: total knee arthroplasty; CI: confidence interval.

The mean 3-years revision percentage is 3.55 in the Netherlands in 2012-2016.

Confidence intervals indicate the plausible range of outcome if all hospitals perform equally well. 

Knee » Survival » Revision within 1 and 3 years » Major revision per hospital

FIGURE Funnel plot of proportion of knee major revision arthroplasties within three years after a total knee arthroplasty per hospital in the Netherlands in 2012-2016 (n=115,987)

K48afbeelding.png

Please note: Major revision is defined as revision of at least femur or tibia component.

Please note: The proportion of revisions within 3 years per hospital were adjusted for casemix factors age, gender, ASA score and diagnosis (osteoarthritis versus other).

TKA: total knee arthroplasty; CI: confidence interval.

The mean 3-years major revision percentage is 1.76 in the Netherlands in 2012-2016.

Confidence intervals indicate the plausible range of outcome if all hospitals perform equally well. 

Knee » Survival » Revision within 1 and 3 years » Reasons for revision by type of revision

TABLE Reasons for revision within three years in patients that underwent a knee revision arthroplasty by type of revision in the Netherlands in 2012-2016

Major revision¹ (n=1,887) Minor revision² (n=2,158) Any type of revision³ (n=4,156)
Reasons for revision Proportion4 (%) Proportion4 (%) Proportion4 (%)
Patellar dislocation 2.2 3.8 31.6
Patellar pain 10.2 50.6 31.6
Instability 31.4 23.9 26.7
Infection 17.9 17.3 17.6
Loosening of tibia component 35.0 0.7 16.4
Malalignment 28.7 1.8 14.0
Arthrofibrosis 7.0 6.4 6.8
Loosening of femur component 9.2 0.2 4.3
Periprosthetic fracture 4.1 0.3 2.1
Revision after knee removal 3.9 0.1 1.9
Insert wear 1.1 2.3 1.7
Loosening of patella component 0.3 1.2 0.7
Progression of osteoarthritis 0.4 0.6 0.5
Other 7.6 8.6 8.3

¹ Revision of at least the femur or tibia component.
² Only insert and/or patella exchange (including patella addition).
³ Any type of revision includes minor and major revisions as well as revision procedures that could not be classified as minor or major revision.
4 One patient may have more than one reason for revision or re-surgery. As such, the total proportion is over 100%.

© LROI 2020