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. Author manuscript; available in PMC: 2016 Jan 15.
Published in final edited form as: Acta Biomater. 2014 Nov 4;12:195–206. doi: 10.1016/j.actbio.2014.10.033

Table 7.

Comparison of the mechanical outcomes, averaged over all quadrants, between the control and enzyme-treated groups, in the circumferential and meridional directions. Unpaired Student's t-tests were used for statistical analysis.

Circumferential Meridional


Control Enzyme-treated p-value Control Enzyme-treated p-value
Low-pressure stiffness [kPa] 496.3 ± 251.6 187.2 ± 102.4 <0.0001 953.0 ± 724.8 364.7 ± 590.2 <0.005
High-pressure stiffness [kPa] 6747.3 ± 2045.9 4673.5 ± 1677.6 <0.0005 5595.2 ± 2604.4 4477.1 ± 2131.0 0.12
Transition strain [mm/mm] 0.028 ± 0.012 0.048 ±0.017 <0.0001 0.022 ± 0.016 0.046 ± 0.026 <0.001
Hysteresis [kPa] 0.18 ± 0.06 0.20 ± 0.06 0.31 0.18 ± 0.07 0.20 ± 0.08 0.47
Initial creep rate (first 80 s) [s−1 ] 0.033 ± 0.020 0.037 ±0.019 0.47 0.033 ± 0.057 0.030 ± 0.028 0.86
Final creep rate (after 80 s) [s−1 ] 0.062 ± 0.047 0.096 ±0.077 0.09 0.041 ± 0.058 0.11 ± 0.11 <0.05