Table 3.
The association between quartiles of lateral trochlear inclination (LTI) and patellofemoral joint (PFJ) cartilage damage and bone marrow lesions.
| Quartile 1 (High) | Quartile 2 | Quartile 3 | Quartile 4 (Low) | p for trend | |
|---|---|---|---|---|---|
| LTI Range | >28.11 | 24.92-28.11 | 21.70-24.91 | <21.7 | |
| # of knees | 220 | 221 | 220 | 220 | |
| Lateral PFJ | |||||
| Cartilage Damage | |||||
| WORMS ≥2 n/N | 109/439 | 159/441 | 170/440 | 204/440 | |
| (%) | (25) | (36) | (39) | (46) | |
| Adjusted OR* | 1.0 | 1.7 | 1.9 | 2.6 | <0.0001 |
| (95% CI) | (reference) | (1.2, 2.4) | (1.4, 2.7) | (1.9, 3.7) | |
| Bone Marrow Lesions | |||||
| WORMS ≥1 n/N | 70/439 | 79/442 | 99/440 | 131/440 | |
| (%) | (16) | (18) | (23) | (30) | |
| Adjusted OR* | 1.0 | 1.1 | 1.5 | 2.3 | <0.0001 |
| (95% CI) | (reference) | (0.8, 1.7) | (1.0, 2.3) | (1.5, 3.3) | |
| Medial PFJ | |||||
| Cartilage Damage | |||||
| WORMS ≥2 n/N | 182/439 | 215/441 | 224/440 | 227/440 | |
| (%) | (41) | (49) | (51) | (52) | |
| Adjusted OR* | 1.0 | 1.3 | 1.5 | 1.6 | 0.004 |
| (95% CI) | (reference) | (1.0, 1.8) | (1.1, 2.0) | (1.2, 2.1) | |
| Bone Marrow Lesions | |||||
| WORMS ≥1 n/N | 81/439 | 98/442 | 90/440 | 74/440 | |
| (%) | (18) | (22) | (21) | (17) | |
| Adjusted OR* | 1.0 | 1.3 | 1.1 | 0.9 | 0.39 |
| (95% CI) | (reference) | (0.9, 1.8) | (0.8, 1.6) | (0.6, 1.3) |
*
OR=odds ratio, adjusted for age, sex, and BMI