Measurements of the trapezius and erector spinae muscles using virtual touch imaging quantification ultrasound-Elastography: a cross section study

Table 2 Shear wave velocities in subjects aged ≤60 and >60 years

N = 278	Mean ± SD ≤ 60 years	Mean ± SD > 60 years	z-value	p-value
Left trapezius	2.78 ± 0.38	2.81 ± 0.38	0.3953	0.3463
Right trapezius	2.74 ± 0.41	2.91 ± 0.23	2.05613	0.0052*
Left erector spinae	2.85 ± 0.52	3.11 ± 0.75	1.7048	0.0441*
Right erector spinae	2.84 ± 0.58	3.07 ± 0.49	1.9641	0.0248*

Data not normally distributed: Wilcoxon Two-Sample Test (z-values); * = significant

ISSN: 1471-2474