Table 4.
Correlation coefficients between individual echo intensity values for each portion of the quadriceps femoris and strength and functional tests (n = 45)
| MIVC | 30SS | UGS | |
|---|---|---|---|
| RFEI (A.u.) | −0.314* | −0.505** | −0.347* |
| VLEI (A.u.) | −0.399** | −0.409** | −0.206 |
| VIEI (A.u.) | −0.452** | −0.280 | −0.152 |
| VMEI (A.u.) | −0.385** | −0.427** | −0.195 |
RFEI rectus femoris echo intensity, VLEI vastus lateralis echo intensity, VIEI vastus intermedius echo intensity, VMEI vastus medialis echo intensity, MIVC maximal isometric voluntary contraction, 30SS 30-s sit-to-stand-up test, UGS usual gait speed
*P < 0.05; **P < 0.01 (statistical difference)