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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)
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X