Table 1 Participant characteristics for all included patients with knee osteoarthritis

n

94

Age, years

61.7 ± 7.1

Sex (% female)

65 (69.1%)

BMI, kg/m²

29.1 ± 4.7

Radiographic severity (KL grade), n (%)

0, 1

1 (1%), 29 (31%)

2, 3, 4

25 (27%), 21 (22%), 18 (19%)

Knee pain, NRS

5.2 ± 2.2

Duration complaints, years

11.4 ± 9.7

Percentage of non-contractile tissue (median, standard error, minimum—maximum, interquartile range)

11.2, 1.6, 0.1–63.0, 18.3

Vastus medialis thickness, mm

46.6 ± 7.5

Muscle strength (normalized to body weight), Nm/kg

0.9 ± 0.4

Get-Up and Go time, seconds

10.9 ± 2.3