Table 2.

Strain hardening behavior of static uniaxially stretched fibrin microthreads. Microthreads were pulled to failure under uniaxial tension and the stress-strain plots were analyzed for the initial modulus and the maximum tangent modulus (MTM). The strain hardening ratio is defined as the ratio between the MTM and the initial modulus. Data is presented as mean ± standard deviation.

Stretch Percent (%)	Initial Modulus (MPa)	MTM (MPa)	Strain Hardening Ratio
0	2.2 ± 1.6‡	7.5 ± 9.7	3.9 ± 4.6
50	7.6 ± 9.0†	15.0 ± 24.5	2.7 ± 1.0
75	6.6 ± 5.2‡†	18.9 ± 20.5	3.0 ± 1.3
100	22.3 ± 33.9*	48.6 ± 73.0	4.7 ± 7.3
125	13.3 ± 8.8‡	41.0 ± 49.8	4.2 ± 6.8
150	17.8 ± 18.3‡	59.8 ± 72.7	4.3 ± 7.8
175	21.5 ± 35.7‡*	44.7 ± 54.5	3.8 ± 4.9
200	30.9 ± 22.4‡*	81.1 ± 107.1	2.7 ± 1.5

^*indicates significance with the 0% stretch group and

^†indicates significance with the 200% stretch group as determined by one-way ANOVA with Holm-Sidak post hoc analysis, and

^‡indicates significance between initial modulus and MTM within a single percentage group as determined by Student's t-test (p < 0.05, n≥41).