Table 2 Angular and linear measurements of the correspondence group and the non-correspondence group
Series (n = 82) | Correspondece (n = 69) | Non-correspondence (n = 13) | P value | |
|---|---|---|---|---|
168.5° ≦ FTA ≦ 171.5 | FTA < 168.5°, 171.5° < FTA | |||
Pre-planning measurements | ||||
FTA (°) | 181.5 | 181.3 | 182.1 | 0.82 |
180.7—182.3 | 180.4—182.2 | 179.5—184.8 | ||
WBL ratio (%) | 15.6 | 17.2 | 9.1 | 0.12 |
12.3—18.9 | 13.7—20.7 | -1.1—19.4 | ||
lower leg length (mm) | 767.0 | 766.5 | 771.3 | 0.63 |
754.4—779.7 | 752.3—780.6 | 735.6—807.0 | ||
femoral leg length (mm) | 416.0 | 416.0 | 416.8 | 0.95 |
409.5—422.5 | 408.7—423.2 | 397.8—435.8 | ||
tibial leg length (mm) | 345.8 | 345.1 | 345.0 | 0.42 |
339.5—352.1 | 338.1—352.2 | 333.0—367.0 | ||
neck shaft angle | 127.2 | 128.1 | 122.3 | 0.003 |
125.9—128.5 | 126.8—129.4 | 118.5—126.1 | ||
HKA (°) | 7.9 | 7.5 | 9.3 | 0.21 |
7.1—8.7 | 6.7—8.4 | 6.7—11.8 | ||
mLDFA (°) | 89.8 | 89.6 | 90.6 | 0.30 |
89.1—90.4 | 88.9—90.3 | 88.5—92.7 | ||
mMPTA (°) | 84.1 | 84.2 | 83.3 | 0.10 |
83.5—84.7 | 83.7—84.8 | 81.6—85.0 | ||
JLCA (°) | 2.5 | 2.5 | 2.8 | 0.57 |
2.2—2.9 | 2.2—2.9 | 1.9—3.7 | ||
JLO (°) | 2.5 | 2.6 | 1.8 | 0.37 |
2.1—3.0 | 2.1—3.1 | 0.8—2.9 | ||
femoral bowing (°) | 0.4 | 0.2 | 0.9 | 0.88 |
-0.5—1.2 | -0.6—1.1 | -2.1—3.9 | ||
tibial bowing (°) | 0.4 | 0.3 | 0.8 | 0.49 |
-0.1—0.8 | -0.2—0.7 | -0.9—2.4 | ||
Post-planning measurements | ||||
FTA (°) | 169.8 | 169.9 | 168.9 | 0.002 |
169.5—170.0 | 169.8—170.1 | 167.7—170.0 | ||
opening gap (mm) | 13.9 | 13.4 | 16.0 | 0.18 |
13.0—14.8 | 12.5—14.4 | 12.7—19.3 | ||
opening angle (°) | 12.0 | 11.6 | 13.5 | 0.18 |
11.2—12.8 | 10.8 -12.5 | 10.9—16.1 | ||
HKA (°) | -2.9 | -2.9 | -2.7 | 0.64 |
-3.0—-2.7 | -3.0—-2.7 | -3.3—-2.1 | ||
mMPTA (°) | 95.0 | 94.9 | 95.5 | 0.30 |
94.4—95.5 | 94.3—95.4 | 93.2—97.7 | ||