Descriptive statistics of the study population
| All (n = 2834) | Men (n = 1615) | Women (n = 1219) | |
|---|---|---|---|
| *Categories not mutually exclusive due to multiple joints affected. | |||
| †Body mass index = weight in kilograms/(height in metres)2. | |||
| Mean age (SD) | 61.8 (9.3) | 61.1 (9.3) | 62.5 (9.3) |
| Mean age at start of symptoms (SD) | 54.4 (9.1) | 54.2 (8.9) | 54.7 (9.3) |
| Joint affected (%)* | |||
| Knee | 59.3 | 63.9 | 53.3 |
| Hip | 31.8 | 35.4 | 27.0 |
| Hand | 27.4 | 15.8 | 42.7 |
| ⩾2 of above | 8.8 | 5.5 | 20.6 |
| Missing | 13.9 | 13.5 | 14.9 |
| Bilateral OA (%) | |||
| Knee | 43.1 | 41.1 | 46.8 |
| Hip | 26.6 | 24.3 | 31.2 |
| Hand | 65.6 | 55.1 | 70.9 |
| Professional status | |||
| Active | 41.3 | 45.5 | 36.2 |
| Retired | 54.4 | 52.6 | 56.8 |
| Unemployed | 4.3 | 1.9 | 7.0 |
| History of trauma in joint affected by osteoarthritis | 24.0 | 28.0 | 18.7 |
| BMI†⩾25 | 60.7 | 70.6 | 48.7 |