|
Predictors
|
Regression coefficient
|
Standard error
|
Wald χ2
|
P value
|
OR
|
OR 95% CI
|
|---|
|
Age (X1)
|
0.096
|
0.036
|
7.130
|
0.008
|
1.100
|
1.026–1.180
|
|
Type of fracture (X2)
| | |
6.750
|
0.034
| | |
|
Type of fracture (A3)
|
2.419
|
0.854
|
6.323
|
0.012
|
8.572
|
1.606–45.750
|
|
Type of fracture (PF)
|
2.205
|
1.024
|
4.639
|
0.031
|
9.073
|
1.220–67.506
|
|
Quality of reduction (X3)
|
2.036
|
0.733
|
7.713
|
0.005
|
7.663
|
1.821–32.253
|
|
R2 (X4)
|
− 1.127
|
0.425
|
7.011
|
0.008
|
0.324
|
0.141–0.746
|
|
Constant
|
− 7.879
|
2.509
|
9.861
|
0.002
|
0.000
|
–
|
- PF periprosthetic fracture after total knee arthroplasty, R2 ratio of the length of the plate/fracture area above the condylar
- The classification of each factor: fracture type X2:1 = A2/C1/C2 fracture, 2 = A3 fracture, 3 = PF; X3:1 = satisfactory reduction, 2 = poor reduction
