Table 1 Patients’ demographic and preoperative radiological data

Age, y

64.6 ± 8.4 (45–83)

66.1 ± 7.4 (47–79)

n.s.

Body mass index, kg/m²

26.4 ± 3.7 (20.0–40.2)

26.8 ± 3.8 (19.3–36.6)

n.s.

Side, left/right

28/23

30/36

n.s.

Gender, male/female

18/33

23/43

n.s.

Kellgren-Laurence grade 1/2/3/4

0/0/3/48

0/6/22/38

< 0.001

mLDFA, °

88.0 ± 1.5 (83.4–92.1)

87.5 ± 2.6 (82.2–93.6)

n.s.

mMPTA, °

82.9 ± 2.5 (75.4–90.1)

84.8 ± 2.1 (79.1–89.4)

< 0.001

Standing HKA, °

−11.0 ± 3.2 (− 20.8 – −3.5)

−7.4 ± 3.7 (− 19.4 – −0.1)

< 0.001

Supine HKA, °

−8.2 ± 2.6 (− 16.5 – −2.2)

−5.8 ± 3.0 (− 14.7 – −0.6)

< 0.001

ΔHKA, °

2.8 ± 1.8 (− 3.7–6.5)

1.6 ± 1.2 (− 1.0–4.7)

< 0.001

Standing WBL ratio, %

−2.9 ± 14.7 (− 36.9–32.6)

13.7 ± 16.0 (− 38.7–44.0)

< 0.001

Supine WBL ratio, %

11.1 ± 11.3 (− 20.1–36.1)

21.8 ± 12.6 (− 13.0–45.9)

< 0.001

ΔWBL ratio, %

14.0 ± 8.3 (− 11.1–32.8)

8.1 ± 5.4 (− 0.3–25.7)

< 0.001

Standing JLCA, °

5.9 ± 2.1 (2.2–9.8)

4.8 ± 2.3 (0.7–10.8)

< 0.05

Supine JLCA, °

2.0 ± 1.9 (− 1.7–6.6)

2.7 ± 2.3 (− 2.1–9.9)

n.s.

ΔJLCA, °

−3.9 ± 2.1 (− 10.5 – −0.3)

−2.1 ± 1.8 (− 6.2–1.7)

< 0.001