Table 3.
Knee pain, medial and lateral tibiofemoral (TF) and patellofemoral (PF) cartilage damage by categories of increasingly planus foot morphology
| Foot Morphology (Staheli Arch Index (SAI)) |
|||||
|---|---|---|---|---|---|
| Cavus SAI = 0 |
 |
Planus 0.57–1.20 |
p for trend |
||
| 0.01–0.33 | 0.34–0.56 | ||||
| Knee Pain | |||||
| # of knees | 745 | 1013 | 941 | 1047 | |
| % painful | 18.0 | 21.4 | 21.8 | 30.4 | 0.05 |
| Adjusted OR* | 1.00 | 1.14 | 1.03 | 1.39 | |
| (95% CI) | (reference) | (0.88, 1.47) | (0.78, 1.37) | (1.05, 1.84) | |
| Cartilage Damage | |||||
| Medial TF | |||||
| # of plates | 885 | 1351 | 1422 | 1786 | |
| % WORMS ≥1 | 15.0 | 18.2 | 21.9 | 29.0 | 0.001 |
| Adjusted OR* | 1.00 | 1.19 | 1.37 | 1.76 | |
| (95% CI) | (reference) | (0.82, 1.73) | (0.96, 1.96) | (1.24, 2.50) | |
| Lateral TF | |||||
| # of plates | 885 | 1344 | 1430 | 1781 | |
| % WORMS ≥1 | 10.2 | 9.0 | 11.0 | 12.1 | 0.98 |
| Adjusted OR* | 1.00 | 0.80 | 0.94 | 0.94 | |
| (95% CI) | (reference) | (0.51, 1.25) | (0.60, 1.49) | (0.62, 1.44) | |
| Medial PF | |||||
| # of plates | 350 | 520 | 557 | 689 | |
| % WORMS ≥1 | 40.9 | 45.6 | 45.4 | 49.1 | 0.98 |
| Adjusted OR* | 1.00 | 1.13 | 1.03 | 1.03 | |
| (95% CI) | (reference) | (0.81, 1.57) | (0.73, 1.45) | (.73, 1.45) | |
| Lateral PF | |||||
| # of plates | 354 | 533 | 563 | 708 | |
| % WORMS ≥1 | 27.1 | 28.3 | 30.2 | 34.0 | 0.66 |
| Adjusted OR* | 1.00 | 0.94 | 0.94 | 0.92 | |
| (95% CI) | (reference) | (0.66, 1.36) | (0.66, 1.35) | (0.64, 1.32) | |
*
Adjusted for age, sex, BMI