Skip to main content
. Author manuscript; available in PMC: 2023 Feb 1.
Published in final edited form as: J Mech Behav Biomed Mater. 2021 Nov 24;126:104984. doi: 10.1016/j.jmbbm.2021.104984

Table 4:

Statistics quantifying the change in mechanical properties and shear wave speed squared – stress regression parameters for the phantoms in Set 2 across specimens, testing sessions, and trials. All properties and parameters except R2 differed significantly across specimens. All properties and parameters except the y-intercept differed significantly across testing sessions.

Specimen Testing Session Trial
p-value Standard deviation Linear model coefficient p-value Standard deviation Standard deviation
Mechanical Properties
 Elastic modulus <0.001 10.27 MPa −1.57 MPa/session <0.001 5.70 MPa -
 Hysteresis <0.001 0.94 % 0.38 %/session <0.001 1.01 % -
Shear wave speed squared - stress regression parameters
 Slope <0.001 0.18 kPa/m2/s2 0.02 kPa/m2/s2/session 0.002 0.17 kPa/m2/s2 0.12 kPa/m2/s2
 Y-intercept 0.014 291.09 kPa −7.15 kPa/session 0.537 297.52 kPa 285.47 kPa
 R2 0.095 0.04 −0.008 /session <0.001 0.05 0.04