Association between incident radiographic osteoarthritis and body mass index, for the knee (n = 1372) and hip (n = 2852)
| BMI (kg/m2) | Knee | Hip | ||
|---|---|---|---|---|
| Incident ROA (%) | OR (95% CI) | Incident ROA (%) | OR (95% CI) | |
| BMI, body mass index; ROA, radiographic osteoarthritis. | ||||
| ORs were adjusted for age, sex and follow-up time. | ||||
| Incident ROA is defined by baseline Kellgren and Lawrence ⩽grade 1 and follow-up Kellgren and Lawrence ⩾grade 2. | ||||
| ⩽25 | 3.0 | 1 | 3.5 | 1 |
| >25–27.5 | 5.2 | 1.9 (1.2 to 3.2) | 4.5 | 1.3 (0.9 to 1.9) |
| >27.5 | 9.3 | 3.3 (2.1 to 5.3) | 4.0 | 1.0 (0.7 to 1.5) |