Sitting vs. supine ultrasound measurements of the vastus medialis: correlations with MRI measurements and age considerations

Table 2 Comparisons of muscle thickness and echo intensity in the supine and sitting postures evaluated using ultrasound

	Supine	Sitting	T-value	Diff.	95% CI	p-value	Effect size
Tukey test	Mean ± SD		T-value	Diff.	95% CI	p-value	Partial η²
Total sample
MT, cm	3.30 ± 0.64	3.04 ± 0.57	3.35	0.24	0.10 to 0.39	< 0.001	0.04
EI, a.u.	68.0 ± 15.4	78.1 ± 13.9	−5.63	−10.91	−14.72 to −7.10	< 0.001	0.11
Paired t-test							Cohen’s d
Young
MT, cm	3.56 ± 0.53	3.35 ± 0.51	3.45	0.20	0.08 to 0.32	< 0.001	0.40
EI, a.u.	59.2 ± 11.7	67.7 ± 10.2	−5.47	−8.45	−11.57 to −5.34	< 0.001	0.77
Older
MT, cm	3.19 ± 0.66	2.90 ± 0.54	6.24	0.28	0.19 to 0.38	< 0.001	0.48
EI, a.u.	72.1 ± 15.3	83.0 ± 12.6	−8.64	−10.91	−13.42 to −8.40	< 0.001	0.78

In total sample, results of the Tukey test for post hoc comparison against posture factor following two-way ANOVA are presented. In the older and young subgroups, results of paired t-test amongst MT and EI in the supine and sitting postures are presented

ISSN: 1880-6805