Table 4. Correlations between muscle strength and the corresponding MRI findings from the muscles (contractile CSA and fatfraction) and between the fatfraction and the clinical tests (sum rank score and 6MWT).
| Patients | Controls | ||
|---|---|---|---|
| Contractile CSA | Muscle strength | ||
| Knee flexors2 | r = 0.86** | r = 0.31 | |
| Knee extensors2 | r = 0.88** | r = 0.90** | |
| Hip extensor2 | r = 0.83* | r = 0.38 | |
| Hip flexor3 | r = 0.29 | r = 0.67** | |
| Fat fraction | Muscle strength | ||
| Knee flexors2 | r = −0.83* | r = − 0.14 | |
| Knee extensors2 | r = − 0.43 | r = − 0.25 | |
| Hip extensor2 | r = − 0.68 | r = 0.07 | |
| Hip flexor3 | r = − 0.14 | r = 0.24 | |
| Total fat fraction | Sum rank-score1 | r = 0.38 | |
| Total fat fraction | 6MWT1 | r = − 0.50 | |
Notes.
*
p < 0.05.
**
p < 0.01.
Analysis was done by Spearman’s correlation. The superscript indicates the number of missing data in the patients group in the given analysis, e.g. knee flexors 2 indicates missing data from two patients.