Table 1 Descriptive statistics for revision TKAs performed during the study period, including select patient demographics, details regarding the primary TKA and revision TKA. Percentages listed for time to revision, primary time period, and revision time period are from the total number of revisions included in the given time period. Percentages for revision description are percent of total for given etiology. Data listed for BMI, age at index TKA, and time to revision TKA are mean ± standard deviation
From: Evolving etiologies and rates of revision total knee arthroplasty: a 10-year institutional report
All Causes | PJI | Aseptic Loosening | Instability | Osteolysis | Arthrofibrosis | PE Wear | Malalignment | Patellar Loosening | Periprosthetic Fracture | Pain | Extensor Mechanism Deficiency | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Revision TKAs | 258 | 75 (29.3%) | 51 (19.7%) | 30 (11.6%) | 27 (10.4%) | 21 (8.1%) | 20 (7.7%) | 14 (5.4%) | 8 (3.1%) | 6 (2.3%) | 4 (1.5%) | 2 (0.8%) |
Male | 120 | 43 | 21 | 10 | 13 | 8 | 11 | 8 | 5 | 0 | 0 | 1 |
BMI [Kg/m2] | 29.3 | 28.6 +/- 6.2 | 29.5 +/- 5.1 | 31.7 +/- 7.4 | 28.0 +/- 3.9 | 29.3 +/- 5.9 | 30.1 +/- 6.4 | 28.5 +/- 4.6 | 30.7 +/- 6.5 | 25.5 +/- 5.9 | 32.0 | |
Age at Index TKA [years] | 62.7 +/- 10.7 | 67.2 +/- 11.7 | 62.7 +/- 9.4 | 59.8 +/- 11.9 | 56.9 +/- 8.8 | 64.3 +/- 7.9 | 55.8 +/- 11.1 | 61.9 +/- 7.1 | 61.9 +/- 9.4 | 67.3 +/- 6.6 | 61.2 +/- 4.7 | 55.1 |
Time to Revision TKA [years] | 6.8 +/- 6.3 | 4.4 +/- 5.1 | 8.4 +/- 5.8 | 4.4 +/- 5.3 | 15.7 +/- 3.9 | 3.2 +/- 2.6 | 11.0 +/- 5.7 | 3.8 +/- 3.6 | 6.6 +/- 5.5 | 11.4 +/- 9.4 | 3.0 +/- 4.4 | 2.2 |
Time to Revision: | ||||||||||||
<2 years | 76 (29.3%) | 36 (47.4%) | 4 (5.3%) | 14 (18.4%) | 0 | 10 (13.2%) | 1 (1.3%) | 6 (7.9%) | 2 (2.6%) | 0 | 3 (3.9%) | 0 |
≥2 years | 182 (70.7%) | 39 (21.9%) | 47 (25.7%) | 16 (8.7%) | 27 (14.8%) | 11 (6.0%) | 19 (10.4%) | 8 (4.4%) | 6 (3.3%) | 6 (3.3%) | 1 (0.5%) | 2 (1.1%) |
Primary Time Period: | ||||||||||||
Before 2000 | 76 (29.3%) | 10 (13.2%) | 15 (19.7%) | 3 (3.9%) | 25 (32.9%) | 1 (1.3%) | 14 (18.4%) | 1 (1.3%) | 0 | 5 (6.6%) | 0 | 1 (1.3%) |
After 2000 | 182 (70.7%) | 65 (35.7%) | 36 (19.8%) | 27 (14.8%) | 2 (1.1%) | 20 (11.0%) | 6 (3.3%) | 13 (7.1%) | 7 (3.8%) | 1 (0.5%) | 4 (2.2%) | 1 (0.5%) |
Revision Time Period: | ||||||||||||
2005-2009 | 109 (38.2%) | 35 (32.1%) | 14 (12.8%) | 12 (11.0%) | 10 (9.2%) | 9 (8.3%) | 14 (12.8%) | 5 (4.6%) | 3 (2.8%) | 4 (3.7%) | 2 (1.8%) | 1 (0.9%) |
2010-2014 | 149 (57.8%) | 40 (27.3%) | 37 (24.7%) | 18 (12.0%) | 17 (11.3%) | 12 (8.0%) | 6 (4.0%) | 9 (6.0%) | 5 (3.3%) | 2 (1.3%) | 2 (1.3%) | 1 (0.6%) |
Revision Description: | ||||||||||||
All components | 151 | 45 (60%) | 44 (84.6%) | 8 (26.7%) | 27 (100%) | 9 (42.9%) | 0 | 8 (57.1%) | 0 | 6 (100%) | 3 (75%) | 1 (50%) |
PE exchange | 83 | 30 (40%) | 0 | 22 (73.3%) | 0 | 11 (52.4%) | 20 (100%) | 0 | 0 | 0 | 0 | 0 |
Femoral component | 2 | 0 | 2 (3.8%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Tibial component | 5 | 0 | 3 (5.8%) | 0 | 0 | 0 | 0 | 1 (7.1%) | 0 | 0 | 1 (25%) | 0 |
Patellar component | 12 | 0 | 0 | 0 | 0 | 1 (4.8%) | 0 | 3 (21.3%) | 8 (100%) | 0 | 0 | 1 (50%) |
Unknown | 5 | 0 | 3 (5.8%) | 0 | 0 | 0 | 0 | 2 (14.2%) | 0 | 0 | 0 | 0 |