(Table 5).
No statistically significant correlation was found between muscle
ultrasound evaluations and adiponectin and leptin levels within the
sarcopenic group. It was found that there was also a weak positive
correlation between adiponectin level and rectus abdominis muscle
thickness within the non-sarcopenic group. A moderate-weak and positive
correlation was found between the leptin level and bilateral
gastrocnemius subcutaneous tissue thickness, left gastrocnemius muscle
thickness, bilateral rectus femoris subcutaneous tissue thickness and
rectus abdominis subcutaneous tissue thickness. When the relationship
between body composition values measured by DEXA and muscle parameters
measured by the US were examined; a statistically significant, moderate
and positive correlation was found between FMI and rectus abdominis
muscle thickness in patients of group 1. A statistically significant,
strong and positive correlation was found between SMI and bilateral
gastrocnemius muscle thickness.
When stepwise multiple linear regression analysis was performed, hip
circumferences and gastrocnemius muscle thickness (Model 1) were found
to be significant predictors for SMI (r=0.998, r2=0.995). The
significant variables (p < 0.05 according to correlation
analyses) included in Model 1 are age, body mass index, waist and hip
circumferences, gait speed, rectus femoris and gastrocnemius medialis
muscle thicknesses. Model 2 was included age, body mass index, waist and
hip circumferences, gait speed, grip strength, rectus femoris and
gastrocnemius medialis muscle thicknessesIn (Model 2); hip
circumferences and gastrocnemius muscle thickness were significant
predictors for gait speed (r=1.000, r2=1.000). Gastrocnemius muscle
thickness was the strongest predictor (with a high standardized
regression coefficient) for gait speed in both models.
There was a moderate positive correlation (r: 0.643, p: 0.024) between
walking speed and vitamin D levels and a moderately negative correlation
(r: -0.615, p: 0.033) with fat mass (FM). A moderate negative
correlation (r:-0.594, p: 0.042) was found between the timed up to go
test and leptin levels.