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Table 3 Valgus alignment with postoperative scores

From: Effect of lower limb alignment on outcome after lateral unicompartmental knee arthroplasty: a retrospective study

Preoperative valgus

N

AKS

WOMAC

≤4°

9

88.00 ± 3.39

87.27 ± 3.16

4° to 7°

15

90.27 ± 3.39

90.07 ± 2.36

≥7°

27

91.19 ± 2.08

92.01 ± 1.44

Statistical analysis

p value

≤ 4° versus 4°to 7°

0.057

0.003*

≤ 4° versus ≥ 7°

0.004 *

< 0.001*

4°to 7° versus ≥ 7°

0.306

0.006*

Postoperative valgus

N

AKS

WOMAC

≤-3°

10

86.20 ± 2.82

86.25 ± 1.54

-3° to 3°

17

91.06 ± 1.85

90.50 ± 1.84

≥3°

24

91.58 ± 1.98

92.49 ± 0.92

Statistical analysis

p value

≤-3° versus − 3°to 3°

< 0.001*

< 0.001*

≤-3° versus ≥ 3°

< 0.001*

< 0.001*

-3° to 3° versus ≥ 3°

n.s.

< 0.001*

  1. AKS. The “Knee Score” part of the American Knee Society (AKS) knee score, WOMAC. Western Ontario and McMaster Universities Arthritis Index
  2. Statistical power is 0.41 (preoperative valgus with AKS), 0.70 (preoperative valgus with WOMAC), 0.50(postoperative valgus with AKS) and 0.74 (postoperative valgus with WOMAC) respectively
  3. * Indicates significant difference (p < 0.05)