Table 1 Demographic characteristics and preoperative data of patients

Sex (male %)

22 (13.4%)

Age (years)

66.5 ± 7.6

37.6–85.5

Weight (kg)

63.8 ± 10.0

38.4–109.4

Height (cm)

155.7 ± 6.8

140.0–179.3

Body mass index (kg/m²)

26.3 ± 3.3

18.1–39.8

Follow-up duration (months)

19.8 ± 23.0

12.0–151.8

Preoperative knee ROM

128.5 ± 13.1

90–150

Postoperative knee ROM

130.5 ± 11.5

100–150

Preoperative HSS score

62.5 ± 15.2

11–89

Preoperative KS knee score

54.1 ± 16.8

15–90

Preoperative KS function score

38.0 ± 16.3

3–86

Preoperative WOMAC pain

10.7 ± 4.3

2–27

Preoperative WOMAC stiffness

4.0 ± 2.0

0–10

Preoperative WOMAC physical function

33.2 ± 7.9

4–50

Preoperative WOMAC total

47.9 ± 10.5

14–72

Preoperative FJS

11.1 ± 10.4

2.1–31.3