Table 1 Demographic data

Age (years)^a

65.1 ± 6.9 (53–88)

66.0 ± 9.5 (44–84)

Sex (male/female)

13/75

2/24

Site (right/left)

43/45

7/19

BMI (kg/m²)^a

26.3 ± 4.1 (20.0–42.2)

27.5 ± 4.0 (21.4–41.6)

The Knee Society score© (points)^a

34.9 ± 2.3 (27–40)

33.8 ± 3.3 (27–44)

Pain score (points)^a

12.16 ± 5.1 (0–20)

12.31 ± 7.1 (0–20)

Functional score (points)^a

47.22 ± 6.5 (35–65)

44.00 ± 6.1 (30–50)

ROM (°)^a

121.0 ± 7.1 (90–130)

112.3 ± 12.3 (90–130)

Pre-operative tibiofemoral angle (°)^a

Varus 3.2 ± 2.6 (0–13)

Varus 9.0 ± 3.9 (5–20)

Flexion contracture (°)^a

4.9 ± 4.2 (1–15)

7.4 ± 5.8 (1–18)

Recurvatum (°)^a

1.2 ± 2.8 (5–10)

0.7 ± 2.1 (5–8)

Anterior knee pain (%)

75 %

84.6 %

VAS for Anterior knee pain (points)^a

2.1 ± 1.9 (0–8)

3.2 ± 2.0 (0–6)