The correlation between age and muscle strength in patients with DMD
| Muscle Strength | r | P value | |
|---|---|---|---|
| Proximal upper limb | 3.6 ± 0.8 | −0.517 | .070 |
| Distal upper limb | 4.3 ± 0.5 | −0.693 | .009 |
| Proximal lower limb | 3.3 ± 0.7 | −0.548 | .052 |
| Distal lower limb | 4.3 ± 0.4 | −0.670 | .012 |