Table 1 Characteristics of patients at inclusion

Age, years

 Mean (SD)

65.4 (10.6)

 Median (range)

66 (44–88)

Female gender, n (%)

74 (66.1)

Body mass index^a (kg/m²)

 Mean (SD)

26.4 (4.1)

 <18.5

3 (2.8)

 (18.5–25)

32 (29.4)

 (25–30)

57 (52.3)

 ≥30

17 (15.6)

Study knee, n (%)

 Right

67 (59.8 %)

 Left

44 (3.3 %)

 Right and left

1 (0.9 %)

Duration of knee osteoarthritis^b, years, mean (SD)

3.0 (3.5)

Radiological stage, n (%)

 Grade II

64 (57.1 %)

 Grade III

48 (42.9 %)

Prior knee surgery^b n (%)

29 (27.9 %)

Prior physical medicine and rehabilitation^c

48 (43.6 %)

At least one analgesic drug within 3 months

87 (77.7 %)