Table 2.
Baseline and follow-up patellar cartilage volume, cartilage volume change, and adjusted annual percentage change
| ACLR isolated (n = 32) |
ACLR combined (n = 25) | Controls (n = 9) | p value | |
|---|---|---|---|---|
| Baseline cartilage volume (mm3) | 3328 (822) | 3470 (555) | 3830 (836) | 0.20 |
| Follow-up cartilage volume (mm3) | 3548 (854) | 3596 (634) | 3839 (937) | 0.62 |
| Patellar cartilage volume change (mm3) | 220 (139, 301)1 a | 126 (26, 226) a | 9 (−165, 183)1 | 0.046* |
| Annual percentage change in patellar cartilage volume (%)# | 3.5 (2.3, 4.8)1 2 | 1.3 (−0.1, 2.8)2 | −0.1 (−2.5, 2.3)1 | 0.01* |
Baseline and follow-up patellar cartilage volume were presented as mean (SD). Patellar cartilage volume change and annual percentage change in patellar cartilage volume are presented as mean (95% confidence interval). Patellar cartilage volume change = follow-up volume - baseline volume, thus positive values represent an increase in cartilage volume
*Significant difference (p < 0.05). #Adjusted for age, gender, BMI, baseline cartilage defect score, and baseline patellar bone volume. Post hoc was significantly different for 1 isolated ACLR versus controls, 2 isolated ACLR versus combined ACLR, a follow-up versus baseline