Table 4. Partial correlation analyses in males between the proton density fat fraction (PDFF) of the erector spinae muscles of the segments L3–L5, T12–L2, and T9–T11, and the PDFF of psoas muscles. Age and body mass index (BMI) were included as control variables.
| Variable | Value | PDFF erector spinae muscles L3–L5 | PDFF erector spinae muscles T12–L2 | PDFF erector spinae muscles T9–T11 | PDFF psoas muscles |
|---|---|---|---|---|---|
| PDFF erector spinae muscles L3–L5 | r | 1.000 | 0.923 | 0.502 | 0.819 |
| P | – | <0.001* | 0.020# | <0.001* | |
| PDFF erector spinae muscles T12–L2 | r | 0.923 | 1.000 | 0.673 | 0.847 |
| P | <0.001* | – | 0.001* | <0.001* | |
| PDFF erector spinae muscles T9–T11 | r | 0.502 | 0.673 | 1.000 | 0.373 |
| P | 0.020# | 0.001* | – | >0.05 | |
| PDFF psoas muscles | r | 0.819 | 0.847 | 0.373 | 1.000 |
| P | <0.001* | <0.001* | >0.05 | – |
*, statistically significant P values after Bonferroni correction for multiple testing (P<0.008). #, P values <0.05.