Table 2: Study outcomes.

– – Group 1
Preop Neutral postop Neutral
(n = 47)		 Group 2
Preop Varus Postop Neutral
(n = 104)		 Group 3
Preop Neutral Postop Malaligned (n = 3)		 Group 4
Preop Varus Postop Malaligned
(n = 18)		 p-Value
HKA Preoperative 1.8 ± 1.0 (0.0 – 3.0) 7.0 ± 2.3 (4.0 – 16.0) 2.3 ± 0.6 (2.0 – 3.0) 10.1 ± 3.4 (4.0 – 15.0) n.r.
Postoperative 0.8 ± 1.0 (-2.5 – 2.0) 1.4 ± 1.0 (-2.0 – 3.0) 4.7 ± 0.3 (4.5 – 5.0) 4.3 ± 0.8 (3.5 – 5.5) n.r.
KSS-KS Preoperative 24.3 ± 5.0 25.2 ± 3.7 28.7 ± 3.8 26.1 ± 5.0 0.186
1 year 89.0 ± 3.4 89.4 ± 4.4 86.7 ± 9.2 88.8± 5.0 0.682
2 years 90.1 ± 4.4 90.2 ± 4.9 89.0 ± 11.4 90.1 ± 5.0 0.983
KSS-FS Preoperative 20.9 ± 5.6 19.7 ± 5.6 26.0 ± 8.2 21.9 ± 7.0 0.093
1 year 87.7 ± 6.2 86.9 ± 6.9 86.0 ± 7.2 87.8 ± 5.8 0.872
2 years 88.6 ± 7.0 87.2 ± 7.6 90.7 ± 11.4 87.4 ± 5.9 0.642
WOMAC Preoperative 65.4 ± 7.6 65.3 ± 5.9 62.3 ± 3.5 62.8 ± 4.0 0.387
1 year 26.2 ± 3.5 26.0 ± 4.3 24.7 ± 6.4 27.5 ± 3.5 0.473
2 years 23.6 ± 3.9 23.4 ± 4.9 23.0 ± 7.9 24.4 ± 3.5 0.835
FJS 2 years 64.8 ± 7.9 63.5 ± 8.6 73.0 ± 7.0 69.8 ± 7.0 0.008
HFKS 2 years 35.3 ± 5.1 35.0 ± 4.9 38 ± 5.3 39.3 ± 3.4 0.005
Implant survival at 2 years Any reason 100% 95.2% (95% CI, 88.8 – 98.0%) 100% 100% 0.343
Aseptic loosening 100% 96.1% (95% CI, 90.0- 98.5%) 100% 100% 0.446

Presented as mean ± standard deviation (range). Abbreviations: preop, preoperative; postop, postoperative; n.r., not relevant; HKA, hip-knee-angle; KSS-KS, Knee Society Score - Knee Score; KSSFS, Knee Society Score - Function Score; WOMAC, Western Ontario and McMaster University Osteoarthritis Index; FJS, Forgotten Joint Score, HFKS, High Flexion Knee Score.