Bouchard’s nodes and underlying radiographic changes of OA
| Sex | Age (years) | BMI (kg/m2) | aOR | ||||
|---|---|---|---|---|---|---|---|
| Men | Women | <65 | ⩾65 | <25 | ⩾25 | ||
| Results are shown as odds ratio (95% confidence interval). | |||||||
| JSN, joint space narrowing. Joint space narrowing and osteophyte were defined based on radiographic grade ⩾1 from the scale 0–3; BN, Bouchard’s nodes were measured as present (1) or absent (0); aOR, adjusted odds ratio by age (<65 years v ⩾65 years), sex (female v male), body mass index (normal (<25 kg/m2) v overweight (⩾25 kg/m2)). | |||||||
| JSN | |||||||
| BN = 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| BN = 1 | 2.75 (1.83 to 4.18) | 1.57 (1.27 to 1.81) | 1.15 (0.87 to 1.50) | 1.98 (1.60 to 2.45) | 1.77 (1.37 to 2.28) | 1.64 (1.32 to 2.03) | 1.62 (1.37 to 1.91) |
| Osteophyte | |||||||
| BN = 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| BN = 1 | 3.09 (2.13 to 4.47) | 2.96 (2.52 to 3.47) | 2.69 (2.10 to 3.44) | 3.17 (2.61 to 3.85) | 2.98 (2.35 to 3.78) | 2.98 (2.46 to 3.61) | 2.98 (2.55 to 3.47) |