Table 5 Radiological outcomes of FA-TKA and MA-TKA within CPAK phenotype
CPAK | Radiographic parameters (˚) | CPAK1 | CPAK2 | p-value | Mean diff | 95%CI |
|---|---|---|---|---|---|---|
Mean (SD) | Mean (SD) | |||||
MA-TKA CPAK1 = 20 CPAK2 = 8 | Preoperative | |||||
HKA | 13.45(5.3) | 5.3 (3.6) | < 0.001 | 8.1 | (4.6,11.5) | |
LDFA | 89.2(2.0) | 86.75(1.5) | < 0.001 | 2.5 | (1.1,3.8) | |
MPTA | 82.8(1.9) | 85.7(0.8) | < 0.001 | − 3.0 | (− 4.0,− 1.9) | |
KJLO | 3.15(1.3) | 2.5(1.2) | 0.23 | 0.7 | (− 0.4,1.7) | |
Tibial plafond inclination | 98.5(4.5) | 93.75(4.0) | 0.02 | 4.8 | (1.34,8.15) | |
Talar inclination | 100(4.0) | 94.625(5.1) | 0.02 | 5.4 | (1.44,9.30) | |
Tibiotalar tilt angle | 2.45(2.3) | 1.25(0.7) | 0.05 | 1.2 | (0.05,2.34) | |
Postoperative | ||||||
HKA | 2.9(2.1) | 1.6 (1.5) | 0.09 | 1.3 | (− 0.1,2.6) | |
LDFA | 90.8(2.8) | 90.1(1.7) | 0.45 | 0.7 | (− 1.06,2.41) | |
MPTA | 89.45(1.4) | 90.1(1.6) | 0.33 | − 0.7 | (− 1.98,0.63) | |
KJLO | 5.1(1.3) | 3.8(1.80) | 0.11 | 1.2 | (− 0.16,2.6) | |
Tibial plafond inclination | 93.4(3.0) | 90.7(2.6) | 0.03 | 2.7 | (0.43,4.96) | |
Talar inclination | 95.2(3.1) | 89.2(3.5) | < 0.001 | 6.0 | (3.14,8.75) | |
Tibiotalar tilt angle | 1.85(1.4) | 0.5(0.7) | < 0.001 | 1.4 | (0.522,2.17) | |
FA | Preoperative | |||||
HKA | 11.4 (5.9) | 6(3.3) | 0.01 | 5.38 | (1.66,9.10) | |
LDFA | 89.5 (1.9) | 87.1 (1.4) | < 0.001 | 2.38 | (1.06,3.70) | |
MPTA | 82.3 (1.7) | 86.4 (1.5) | < 0.001 | − 4.08 | (− 5.31,− 2.83) | |
KJLO | 3.6 (1.5) | 3.2 (1.2) | 0.48 | 0.38 | (− 0.67,1.44) | |
Tibial plafond inclination | 96.7 (4.1) | 92.8 (5.8) | 0.06 | 3.92 | (0.06,7.77) | |
Talar inclination | 99.3(5.1) | 94.9 (5.1) | 0.04 | 4.38 | (0.42,8.34) | |
Tibiotalar tilt angle | 2.8 (2.6) | 1.8 (1.6) | 0.25 | 1.00 | (− 0.67,2.67) | |
Postoperative | ||||||
HKA | 2.7 (2.7) | 2.1 (1.3) | 0.43 | 0.69 | (− 0.97,2.36) | |
LDFA | 89.2 (2.6) | 90.15 (3.2) | 0.43 | − 0.92 | (− 3.15,1.30) | |
MPTA | 88.4(2.6) | 89.2 (1.7) | 0.34 | − 0.85 | (− 2.56,0.86) | |
KJLO | 3.1 (2.0) | 2.9 (1.5) | 0.83 | 0.15 | (− 1.23,1.53) | |
Tibial plafond inclination | 91(2.9) | 90.1 (2.9) | 0.47 | 0.85 | (− 1.43,3.12) | |
Talar inclination | 93.8 (4.8) | 91.8 (2.9) | 0.09 | 2.77 | (− 0.32,5.86) | |
Tibiotalar tilt angle | 1.4(1.9) | 0.8 (0.9) | 0.38 | 0.54 | (− 0.62,1.69) | |