Application of real-time shear wave elastography to Achilles tendon hardness evaluation in older adults

Table 1 Elastic modulus of bilateral Achilles tendon in relaxed state among multiple groups of measurement data, mean ± SD

Variable		55-60 (n = 35)	61-65 (n = 14)	66-70 (n = 11)	F value	P value
Relaxed modulus of elasticity	Left average	326.39 ± 81.44	315.09 ± 57.09	365.51 ± 63.38	1.609	0.209
	Right average	354.63 ± 90.1	321.42 ± 59.88	406.98 ± 127.42	2.666	0.078

Table 2 Elastic modulus of bilateral Achilles tendon in relaxed state, mean ± SD

variable		Male (n = 15)	Female (n = 45)	t value	P value
Relaxed modulus of elasticity	Left average	323.69 ± 61.47	333.33 ± 78.55	-0.433	0.667
	Right average	352.33 ± 78.6	357.86 ± 100.4	-0.194	0.847

Table 3 Elastic modulus of Achilles tendon in relaxed state, mean ± SD

Variable	Left average	Right average	t value	P value
Relaxed modulus of elasticity	330.92 ± 74.27	356.48 ± 94.81	-2.849	0.006

Table 4 Elastic modulus of bilateral Achilles tendon, mean ± SD

Variable	Relaxed modulus of elasticity	Elastic modulus under tension	t value	P value
Left average	330.92 ± 74.27	762.92 ± 26.02	-44.262	< 0.001
Right average	356.48 ± 94.81	768.74 ± 24.05	-34.413	< 0.001

Table 5 Elastic modulus of two groups of three segments of bilateral Achilles tendon in relaxed state, mean ± SD

Variable	Relaxed modulus of elasticity	t value	P value
Far left	288.19 ± 83.67	-4.288	<0.001
Middle left	328.11 ± 81.92
Far left	288.19 ± 83.67	-6.206	<0.001
Near left	376.46 ± 105.42
Middle left	328.11 ± 81.92	-4.326	<0.001
Near left	376.46 ± 105.42
Far right	329.61 ± 118.97	-2.309	0.024
Middle right	353.75 ± 98.01
Far right	329.61 ± 118.97	-4.424	<0.001
Near right	386.08 ± 103.78
Middle right	353.75 ± 98.01	-3.144	0.003
Near right	386.08 ± 103.78