Baseline characteristics
| Characteristic | Participants (N= 991)a |
|---|---|
| Age, years, mean (SD) | 55.9 (5.2) |
| Sex, female, n (%, 95% CI) | 782 (78.9, 76.4 to 81.4) |
| BMI, kg/m2, mean (SD) | 26.2 (4.0) |
| Ethnicity, White, n (%, 95% CI) | 965 (97.5, 96.5 to 98.5) |
| Highest level of education, n (%, 95% CI) | |
| Primary | 186 (19.3, 16.8 to 21.8) |
| Secondary | 437 (45.3, 42.2 to 48.4) |
| Higher | 341 (35.4, 32.4 to 38.4) |
| Hip pain, n | |
| No pain | 409 |
| Pain | 582 |
| Unilateral pain | 375 |
| Bilateral pain | 207 |
| Morning stiffness in any hip, n (%, 95% CI) | 343 (35.9, 32.9 to 38.9) |
| Knee pain in any knee, n (%, 95% CI) | 821 (82.8, 80.5 to 85.1) |
| Duration of complaints, months, mean (SD) | 24.6 (24.2) |
| Standardised WOMAC score, mean (SD) | |
| Total (0–100) | 24.6 (16.5) |
| Pain (0–100) | 25.3 (17.2) |
| Stiffness (0–100) | 33.1 (21.0) |
| Function (0–100) | 23.5 (17.2) |
| NRS hip and/or knee pain past week (0–10), mean (SD) | 3.6 (2.1) |
| Using any pain medication, n (%, 95% CI) | 369 (38.0, 35.0 to 41.0) |
↵a Data missing for education (n = 27 individuals), ethnicity (n = 1), morning stiffness (n = 36), and pain medication (n = 19). BMI = body mass index. NRS = Numeric Rating Scale (in which 0 corresponds to no pain). SD = standard deviation. WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index (in which 0 corresponds to no complaints).