Table 2.
Associations among surrogate measures of muscle quality and body composition estimates.
| Echogenicity a | IMAT b | Subcutaneous Fat b | Total Body Fat c | Lean Body Mass d | ||
|---|---|---|---|---|---|---|
| Echogenicity a | r | 1 | 0.73 | 0.47 | 0.51 | −0.29 |
| p-value | <0.001 * | 0.008 * | 0.004 * | 0.126 | ||
| IMAT b | r | 1 | 0.38 | 0.54 | 0.03 | |
| p-value | 0.038 * | 0.002 * | 0.882 | |||
| Subcutaneous fat b | r | 1 | 0.62 * | 0.11 | ||
| p-value | <0.001 | 0.553 | ||||
| Total body fat c | r | 1 | 0.18 | |||
| p-value | 0.328 | |||||
| Lean body mass d | r | 1 | ||||
| p-value |
IMAT, intra- and intermuscular adipose tissue; Adj., adjusted; Ext., extensors; * p < 0.05. a Echogenicity obtained from the rectus femoris of the dominant limb and measured via grayscale histogram analysis. b IMAT and subcutaneous fat values derived from computed tomography attenuation at the mid-thigh of the dominant limb; log transformed data used in the analysis. c Total body fat estimated using dual-energy X-ray absorptiometry (DXA). d Lean body mass is appendicular lean mass scaled to height (aLM/ht2).