Table 4.
Proportion of patients without pathologic findings in the Additive MRI score
| Age at prophylaxis start, years | Current age, years |
|||
|---|---|---|---|---|
| 12−16 | 17−21 | 22−26 | 27−35 | |
| All index joints, n/N (%) patients | ||||
| <2 (primary) | 3/4 (75) | 7/8 (88) | 5/9 (56) | 3/4 (75) |
| 2 to 6 (secondary) | 2/4 (50) | 3/7 (43) | 1/5 (20) | 3/6 (50) |
| 6 to 12 (secondary) | − | 1/12 (8) | 2/12 (17) | 0/3 (0) |
| 12 to 18 (secondary) | − | − | 0/7 (0) | 1/14 (7) |
| Never (on demand) | − | 0/1 (0) | 0/10 (0) | 0/12 (0) |
| Both ankles, n/N (%) patients | ||||
| <2 (primary) | 3/4 (75) | 8/8 (100) | 5/9 (56) | 3/4 (75) |
| 2 to <6 (secondary) | 2/4 (50) | 3/7 (43) | 1/5 (20) | 3/6 (50) |
| 6 to <12 (secondary) | − | 1/12 (8) | 2/12 (17) | 0/3 (0) |
| 12 to 18 (secondary) | − | − | 0/7 (0) | 1/14 (7) |
| Never (on demand) | − | 0/1 (0) | 0/10 (0) | 0/12 (0) |
MRI, magnetic resonance imaging.