Hip and Knee Arthroplasty - Surface Hippy Guide to Hip Resurfacing

Table KG6:
Primary Total Knee Replacement requiring Revision by Primary Diagnosis
Primary Diagnosis
Number
Revised
Total
Number
Observed
Component
Years
Revisions per
100 Observed
Component
Years
Exact 95%
CI
Avascular Necrosis 18 641 1963 0.9 (0.54, 1.45)
Osteoarthritis 3962 159529 478528 0.8 (0.80, 0.85)
Other Inflammatory Arthritis 20 852 2818 0.7 (0.43, 1.10)
Rheumatoid Arthritis 63 3385 11347 0.6 (0.43, 0.71)
Tumour 17 216 481 3.5 (2.06, 5.66)
Other (2) 7 141 373 1.9 (0.75, 3.87)
Total 4087 164764 495511 0.8 (0.80, 0.85)
Figure KG4:
Cumulative Percent Revision of Primary Total Knee Replacement by
Primary Diagnosis
Number at Risk 0 Yr 1 Yr 2 Yrs 3 Yrs 4 Yrs 5 Yrs 6 Yrs 7 Yrs
Avascular Necrosis 641 521 409 305 217 135 51 7
Other Inflammatory Arthritis 852 695 570 440 325 219 122 32
Rheumatoid Arthritis 3385 2857 2328 1821 1314 831 396 110
Osteoarthritis 159529 128472 99757 73451 50721 30799 13921 3560
Table KG7:
Yearly Cumulative Percent Revision of Primary Total Knee Replacement
by Primary Diagnosis
CPR 1 Yr 2 Yrs 3 Yrs 5 Yrs 7 Yrs
Avascular Necrosis 0.9 (0.4, 2.1) 1.9 (1.0, 3.5) 2.9 (1.7, 4.9) 4.1 (2.5, 6.8)
Osteoarthritis 1.0 (1.0, 1.1) 2.1 (2.1, 2.2) 2.8 (2.7, 2.9) 3.6 (3.5, 3.8) 4.3 (4.1, 4.5)
Other Inflammatory Arthritis 0.9 (0.4, 1.9) 2.2 (1.3, 3.6) 2.5 (1.6, 4.0) 3.1 (1.9, 4.9)
Rheumatoid Arthritis 0.7 (0.5, 1.1) 1.4 (1.0, 1.8) 1.8 (1.3, 2.3) 2.5 (1.9, 3.3) 3.4 (2.5, 4.7)
Tumour 3.5 (1.6, 7.7) 7.7 (4.3, 13.6) 9.8 (5.7, 16.7) 17.3 (10.2, 28.4)
Other (2) 0.8 (0.1, 5.6) 6.3 (2.8, 13.6) 6.3 (2.8, 13.6) 6.3 (2.8, 13.6)
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