Table 1 Demographic data of participants in subgroups

No. of patient/knees

27/27

32/32

2/2

34/34

16/16

Sex, men/women, n^a

11/16

15/17

0/2

17/17

8/8

n. s. ^e

Age, years (SD^b)

Range

55.4 (12.3)

64.3 (11.9)

64.5 (10.6)

66.3 (10.5)

22.0 (3.1)

f

41–82

43–84

50–56

51–82

15–39

Body mass index, kg/m²

(SD ^b), range

21.9 (3.0)

23.5 (9.4)

22.3 (2.1)

22.0 (3.1)

21.9 (3.1)

n. s. ^e

16.9–29.1

20.0–29.0

20.8–23.8

19.1–29.0

16.6–28.9

Side, right /left, n^a

16/11

14/18

1/1

18/16

10/8

n. s. ^e

Kellgren-Lawrence grade

Grade 0/1/2/3/4, n^a

17/10/0/ 0/0

21/11/0/0/0

0/0/2/0/0

0/0/8/15/11

15/1/0/0/0

Femorotibial angle (°^c) (SD^b), Range

177.9 (1.7)

177.6 (2.3)

175.9 (1.9)

179.4 (3.8)

176.9 (1.4)

g

174.9–182.5

173.0–181.2

174.2–177.2

174.0–184.9

175.6–179.1

Medial meniscus tear (WORMS^d)

Grade 0/1/2/3/4, n ^a

27/0/0/0/0

0/2/16/8/6

2/0/0/0/0

0/0/5/9/20

16/0/0/0/0

Lateral meniscus tear (WORMS^d)

Grade 0 /1/ 2/ 3/4, n^a

25/1/0/0/0

29/1/2/0/0

2/0/0/0/0

29/3/0/1/0

16/0/0/0/0