Table 1.

Mechanical parameters compared between circumferential ET specimens tested in air and PBS. There was no significant difference with respect to any parameter, and the 95% confidence intervals for potential differences are small.

	Air (Mean ± SD)	PBS (Mean ± SD)	Difference (95% CI)
${\overline{\lambda }}_c$	1.033 ± 0.010	1.04 ± 0.01	− 0.017 to 0.008
${\lambda }_c^{\text{SD}}$	0.016 ± 0.004	0.020 ± 0.004	−0.008 to 0.001
kf (MPa)	264 ± 35	238 ± 48	−19 to 71
Yield strain	0.09 ± 0.02	0.09 ± 0.01	−0.02 to 0.02
Yield stress (MPa)	15 ± 3	12 ± 2	−0.43 to 5.66
Modulus (MPa)	271 ± 41	231 ± 43	−9.36 to 91.20
Peak strain	0.28 ± 0.08	0.28 ± 0.09	−0.10 to 0.10
Peak stress (MPa)	40 ± 8	34 ± 7	−4.58 to 15.22