Table 1 Characteristics of participants (n = 434)

Female, n (%)

305 (70)

Age (in years), mean (SD)

63.3 (8.8)

Education, n (%)

 • Secondary education or lower

223 (51)

 • Higher education

211 (49)

BMI, mean [kg/m²], (SD)

27.8 (4.8)

EQ-5D-5L index score, mean (SD)

0.71 (0.1)

EQ-VAS (0–100), mean (SD)

70.7 (14.8)

Daily functioning (KOOS^a; 0–100), mean (SD)

63.5 (18)

Pain VAS (0–10), mean (SD)

5.4 (2.1)

Duration of symptoms, n (%)

 • Less than one year

30 (7)

 • Between one and five years

163 (38)

 • More than five years

241 (56)

Presence of OA in other joints, n (%)

232 (54)

Number of other joint groups with OA (1–9), median (IQR)

2 (1–8)

Knee replacement, n (%)

57 (13)

Presence of comorbidities, n (%)

306 (70.5)

Number of comorbidities (1–20), median (IQR)

2 (1–6)