Odds ratios of OA in siblings
| Definition | Women | Men | Both sexes* |
|---|---|---|---|
| TF OA, tibiofemoral OA; PF OA, patellofemoral OA. | |||
| (95% CIs), adjusted for age, knee pain, BMI, smoking, Heberden’s or Bouchard’s nodes, and meniscectomy; *also adjusted for sex. | |||
| TF OA | 2.0 | 3.0 | 2.5 |
| (1.4 to 3.1) | (1.9 to 5.0) | (1.8 to 3.4) | |
| Moderate-severe TF OA | 2.4 | 2.6 | 2.5 |
| (1.4 to 4.1) | (1.4 to 4.6) | (1.7 to 3.7) | |
| Bilateral TF OA | 1.8 | 2.1 | 2.0 |
| (1.1 to 3.0) | (1.2 to 3.8) | (1.3 to 2.9) | |
| PF OA | 1.7 | 2.0 | 1.9 |
| (1.2 to 2.6) | (1.2 to 3.5) | (1.4 to 2.6) | |
| Moderate-severe PF OA | 1.7 | 1.6 | 1.6 |
| (1.0 to 2.6) | (0.7 to 3.5) | (1.1 to 2.4) | |
| Bilateral PF OA | 1.4 | 3.0 | 1.8 |
| (0.9 to 2.3) | (1.4 to 6.5) | (1.2 to 2.7) | |