| Baseline US osteophytes | Incident OA features at follow-up, n (%) | OR (95% CI) | |
|---|---|---|---|
| Crude | Adjusted | ||
| Kellgren-Lawrence | |||
| Grade 0 (n=215) | 37 (17.2) | 1.0 | 1.0 |
| Grade 1–3 (n=86) | 40 (46.5) | 2.9 (1.6–5.4) | 4.1 (2.0–8.1) |
| Radiographic joint space narrowing | |||
| Grade 0 (n=215) | 9 (4.2) | 1.0 | 1.0 |
| Grade 1–3 (n=86) | 15 (17.4) | 4.2 (1.8–10.2) | 5.3 (2.1–13.4) |
| Radiographic osteophytes | |||
| Grade 0 (n=215) | 28 (13.0) | 1.0 | 1.0 |
| Grade 1–3 (n=86) | 31 (36.0) | 2.9 (1.6–5.4) | 4.2 (2.1–8.5) |
| Tenderness | |||
| Grade 0 (n=190) | 31 (16.3) | 1.0 | 1.0 |
| Grade 1–3 (n=62) | 19 (30.6) | 1.5 (0.9–2.7) | 1.9 (1.1–3.3) |