Periprosthetic Joint Infection Does Not Preclude Good Outcomes after a Revision Total Knee Arthroplasty: A 7-Year Follow-Up Study of 144 Retrospective Cases
Table 2
Results of univariate regression analysis including 13 pre- and intraoperative variables and four clinical outcomes.
ROM
KSKS
KSFS
HSS
Variable
β ± SE
P-value
β ± SE
P-value
β ± SE
P-value
β ± SE
P-value
(1) Age
0.8±0.2
<0.001
0.1±0.2
0.339
0±0.2
0.891
0.2±0.2
0.233
(2) Female gender
1.5±4.6
0.742
3.9±3.2
0.227
0.6±4.3
0.885
0.7±3.3
0.842
(3) Body mass index
0.5±0.4
0.259
0±0.3
0.996
0±0.4
0.919
–0.1±0.3
0.837
(4) Primary diagnosis Osteoarthritis (comparator)
Rheumatoid arthritis
–7.2±6.6
0.279
–1.9±4.8
0.697
–7.5±6.5
0.249
–7.4±4.9
0.132
Other
–3.6±8
0.659
3±5.5
0.590
2.2±7.5
0.771
4.5±5.6
0.425
(5) Cause
–5.3±1.6
0.001
–4.8±1.1
<0.001
–3.7±1.5
0.017
–4.7±1.1
<0.001
(6) Preoperative ROM
0.3±0.1
<0.001
0.1±0
0.014
0.1±0.1
0.028
0.1±0
0.016
(7) Implant
–2.8±3.8
0.460
–3.8±2.6
0.145
–8.4±3.5
0.016
–5.6±2.6
0.034
(8) Standard paramedian approach (comparator)
Quadriceps snip
–7±3.6
0.056
–6.9±2.5
0.006
–10.5±3.3
0.002
–5.2±2.6
0.046
VY quadriceps plasty
–1±5.8
0.866
7.3±3.9
0.066
11.2±5.3
0.037
8±4
0.049
Tibial tubercle osteotomy
–8.4±6.6
0.207
–5.7±4.5
0.208
1.2±6.2
0.85
–7.7±4.9
0.118
(9) Grade 1 femur bone defect (comparator)
Grade 2
–5.1±3.3
0.125
0.9±2.3
0.696
–2.6±3.1
0.397
0.1±2.3
0.955
Grade 3
–21.5±4.8
<0.001
–21.6±3.1
<0.001
–18.5±4.5
<0.001
–18.7±3.2
<0.001
(10) Grade 1 tibial bone defect (comparator)
Grade 2
–10±3.1
0.002
–4.3±2.2
0.051
–8.6±2.9
0.018
–5.2±2.2
0.022
Grade 3
–20.8±6.4
0.001
–13.7±4.4
0.002
–13.7±6.1
0.026
–11.8±4.8
0.016
(11) Insert thickness
0.4±0.6
0.499
0.1±0.4
0.780
0.3±0.5
0.562
0±0.4
0.978
(12) Wound complications
–16.6±7.9
0.038
–8.7±5.5
0.115
–4.4±7.5
0.555
–18.8±5.4
0.001
(13) Single surgery (comparator)
Two-stage
5.2±3.9
0.19
–2.1±2.7
0.448
–5.2±3.7
0.164
1.5±2.8
0.584
Three- or four-stage
–22.3±3.8
<0.001
–15.5±2.7
<0.001
–7.9±3.9
0.025
–16.9±2.6
<0.001
Values are standardized regression coefficients (β) ± standard errors (SE). ROM, range of motion; KSKS, Knee Society knee score; HSS, Hospital for Special Surgery knee score; KSFS, Knee Society function score
