Table 3:

Parameters for the four-fiber family constitutive model describing the isochoric behavior of human FPAs in 7 age groups at the 75^th percentile. Parameters are adjusted for the effects of flattening. Here n is the sample size in each group that was used to derive these parameters. The coefficient of determination R²=0.99 for all age groups.

Age group (years)	n	Cgr(kPa)	$C_1^{\mathit{el}}(kPa)$	$C_2^{\mathit{el}}$	$C_1^{\mathit{smc}}(kPa)$	$C_2^{\mathit{smc}}$	$C_1^{\mathit{col}}(kPa)$	$C_1^{\mathit{col}}$	γ°
16.3 (11-20)	30	0.00	19.03	0.00	2.86	0.79	4.85	0.59	0.95
25.0 (21-30)	37	2.86	16.17	0.09	6.30	1.42	4.77	1.12	0.95
36.0 (31-40)	56	6.79	13.83	0.42	4.73	2.80	2.93	2.36	0.95
46.5 (41-50)	64	7.79	14.03	1.20	5.56	3.34	1.69	5.26	0.90
56.1 (51-60)	125	0.01	18.86	1.47	7.84	4.34	4.95	4.90	0.86
65.0 (61-70)	135	1.56	19.64	2.98	8.39	5.16	1.77	11.83	0.81
75.5 (70-80)	25	4.27	25.31	4.20	10.81	4.06	1.08	15.43	0.80