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Table 3 Postoperative KSS and J-KOOS in the alignment categories for FTA, HKAA, and AJLMA

From: Association between limb alignment and patient-reported outcomes after total knee arthroplasty using an implant that reproduces anatomical geometry

  FTA HKAA AJLMA
Varus
(n = 19)
In-range
(n = 111)
Valgus
(n = 19)
p Varus
(n = 51)
In-range
(n = 96)
Valgus
(n = 2)
p < 2 (group A, n = 75) ≥ 2 (group B, n = 74) Difference (95% CI) p
KSS-KS 96.4 ± 4.2 96.1 ± 5.1 95.9 ± 4.8 0.967 96.5 ± 4.7 95.9 ± 5.1 100.0 ± 0.0 0.425 95.8 ± 5.3 96.4 ± 4.6 0.582 (− 1.059 to 2.222) 0.484
KSS-FS 81.6 ± 13.3 73.5 ± 20.6 69.4 ± 23.4 0.164 74.4 ± 17.9 73.7 ± 21.8 80.0 ± 0.0 0.902 71.0 ± 22.4 77.0 ± 17.8 5.986 (− 0.679 to 12.651) 0.078
KSS-Combined 178.0 ± 14.3 169.6 ± 23.0 165.4 ± 26.2 0.211 170.8 ± 20.2 169.6 ± 24.1 180.0 ± 0.0 0.792 166.8 ± 24.8 173.4 ± 20.0 6.64 (− 0.783 to 14.062) 0.079
J-KOOS-S 81.2 ± 15.7 80.7 ± 13.8 76.7 ± 15.5 0.508 80.0 ± 14.4 80.1 ± 14.1 94.5 ± 2.1 0.363 79.9 ± 13.5 80.6 ± 15.0 0.715 (− 3.895 to 5.326) 0.760
J-KOOS-P 87.1 ± 17.7 87.7 ± 12.5 83.9 ± 13.9 0.521 86.9 ± 14.7 87.1 ± 12.8 97.0 ± 0.0 0.581 87.3 ± 13.1 87.0 ± 13.8 0.361(− 4.718 to 3.997) 0.870
J-KOOS-A 89.7 ± 9.7 85.2 ± 10.9 80.4 ± 15.5 0.046* 84.8 ± 11.6 85.1 ± 11.7 98.5 ± 2.1 0.261 83.2 ± 12.3 87.2 ± 10.6 4.043 (0.323 to 7.763) 0.033*
J-KOOS-SP 52.6 ± 33.8 48.0 ± 28.3 47.6 ± 25.5 0.803 50.0 ± 29.5 47.3 ± 28.2 75.0 ± 0.0 0.362 46.0 ± 28.5 51.2 ± 28.5 5.162 (− 4.075 to 14.4) 0.271
J-KOOS-Q 65.8 ± 24.6 62.2 ± 21.5 57. 2 ± 21.5 0.473 61.7 ± 25.4 61.9 ± 20.1 75.0 ± 0.0 0.701 60.2 ± 20.5 63.9 ± 23.2 3.665 (− 3.415 to 10.744) 0.308
  1. FTA femorotibial angle. FTAs were evaluated and considered in-range if the angle was 173–177°, whereas values outside of this range were categorized as either varus or valgus outliers. HKAA hip-knee-ankle angle. HKAAs were evaluated and considered in-range if the angle was 0 ± 3o, whereas values outside of this range were categorized as either varus or valgus outliers. AJLMA angle between the joint line and the line perpendicular to the mechanical axis. Group A included patients with an AJLMA of < 2° and group B included patients with an AJLMA of ≥ 2°. Group B, but not group A, was defined as kinematic alignment. Data are expressed as mean ± SD. *Significantly different (p < 0.05)