TABLE 3.
Comparison between different regions
|
T2* (ms) |
R
2
|
Volume (mm3) |
||||
|---|---|---|---|---|---|---|
| Knee type | Region | Median (IQR) | p values | Median (IQR) | Median (IQR) | |
| JOCD Stage I n = 5 | Progeny lesion | 26.0 (21.6–28.6) | vs. IN, <0.001 | vs. PB, <0.001 | 0.948 (0.943–0.956) | 191 (124–230) |
| Interface | 10.7 (10.6–11.8) | vs. PB, =0.28 | vs. CB, =0.62 | 0.958 (0.956–0.962) | 120 (101–146) | |
| Parent bone | 3.9 (3.6–3.9) | vs. CB, =0.98 | 0.935 (0.920–0.944) | 377 (336–610) | ||
| Control bone | 4.2 (4.1–5.2) | vs. PL, =0.008 | 0.935 (0.934–0.939) | 723 (537–828) | ||
| JOCD Stage II n = 13 | Progeny lesion | 17.4 (13.8–23.5) | vs. IN, =0.086 | vs. PB, <0.001 | 0.953 (0.948–0.956) | 539 (243–801) |
| Interface | 10.2 (8.7–11.8) | vs. PB, <0.001 | vs. CB, <0.001 | 0.957 (0.943–0.962) | 295 (120–346) | |
| Parent bone | 4.3 (3.8–4.5) | vs. CB, =0.93 | 0.943 (0.935–0.950) | 938 (525–1437) | ||
| Control bone | 4.8 (4.5–5.2) | vs. PL, <0.001 | 0.942 (0.937–0.944) | 2177 (942–2306) | ||
| JOCD Stage III n = 9 | Progeny lesion | 8.7 (6.7–14.6) | vs. IN, =0.73 | vs. PB, =0.001 | 0.951 (0.941–0.959) | 470 (376–739) |
| Interface | 9.6 (7.6–12.7) | vs. PB, =0.006 | vs. CB, =0.06 | 0.953 (0.945–0.964) | 247 (155–323) | |
| Parent bone | 4.2 (3.8–4.5) | vs. CB, =0.99 | 0.939 (0.919–0.947) | 791 (769–1015) | ||
| Control bone | 5.1 (4.5–5.5) | vs. PL, =0.025 | 0.934 (0.925–0.947) | 1454 (1127–1910) | ||
| JOCD Stage IV n = 7 | Progeny lesion | 3.5 (3.4–3.9) | vs. IN, =0.84 | vs. PB, =0.45 | 0.936 (0.927–0.939) | 216 (174–494) |
| Interface | 3.6 (3.3–3.8) | vs. PB, =0.34 | vs. CB, =0.11 | 0.927 (0.917–0.937) | 64 (54–120) | |
| Parent bone | 4.0 (3.9–4.3) | vs. CB, =0.17 | 0.933 (0.925–0.942) | 424 (240–595) | ||
| Control bone | 4.9 (4.4–5.3) | vs. PL, =0.028 | 0.927 (0.925–0.945) | 609 (458–1081) | ||
| Control n = 13 | Control bone | 5.0 (4.6–5.4) | vs. CB in JOCD, =0.06 | 0.938 (0.922–0.940) | 1545 (870–2024) | |
Abbreviations: CB, control bone; IN, interface; IQR, interquartile range; JOCD, Juvenile Osteochondritis Dissecans; PB, parent bone; PL, progeny lesion; R2, coefficient of determination.