Table 4.
The association between quartiles of trochlear angle (TA) and patellofemoral joint (PFJ) cartilage damage and bone marrow lesions.
| Quartile 1 (High) | Quartile 2 | Quartile 3 | Quartile 4 (Low) | p for trend | |
|---|---|---|---|---|---|
| TA Range | <4.96 | 2.96-4.94 | 0.87-2.95 | <0.8 | |
| # of knees | 220 | 221 | 220 | 220 | |
| Lateral PFJ | |||||
| Cartilage Damage | |||||
| WORMS ≥2 n/N | 130/440 | 152/439 | 161/442 | 199/439 | |
| (%) | (30) | (35) | (36) | (45) | |
| Adjusted OR* | 1.0 | 1.3 | 1.4 | 2.0 | 0.0002 |
| (95% CI) | (reference) | (0.5, 1.6) | (0.9, 2.5) | (1.2, 3.5) | |
| Bone Marrow Lesions | |||||
| WORMS ≥1 n/N | 77/440 | 94/439 | 100/442 | 108/440 | |
| (%) | (18) | (21) | (23) | (25) | |
| Adjusted OR* | 1.0 | 1.3 | 1.4 | 1.5 | 0.01 |
| (95% CI) | (reference) | (0.9, 1.9) | (1.0, 2.0) | (1.1, 2.2) | |
| Medial PFJ | |||||
| Cartilage Damage | |||||
| WORMS ≥2 n/N | 206/440 | 219/439 | 200/442 | 223/439 | |
| (%) | (47) | (50) | (45) | (51) | |
| Adjusted OR* | 1.0 | 1.2 | 1.0 | 1.2 | 0.37 |
| (95% CI) | (reference) | (0.9, 1.6) | (0.7, 1.3) | (0.9, 1.6) | |
| Bone Marrow Lesions | |||||
| WORMS ≥1 n/N | 87/440 | 95/439 | 87/442 | 74/440 | 0.08 |
| (%) | (20) | (22) | (20) | (17) | |
| Adjusted OR* | 1.0 | 1.1 | 1.0 | 0.8 | |
| (95% CI) | (reference) | (0.8,1.6) | (0.7, 1.4) | (0.6, 1.1) |
*
OR=odds ratio, adjusted for age, sex, and BMI