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. Author manuscript; available in PMC: 2013 Apr 16.
Published in final edited form as: Osteoarthritis Cartilage. 2012 Jul 31;20(11):1268–1277. doi: 10.1016/j.joca.2012.07.016

Table 2.

Linear correlation coefficients between the structural (superficial layer, 5% of cartilage thickness) and mechanical parameters

E f 0 E f ε E nf k 0 M
Collagen content 0.33 0.16 0.28 0.10 0.56*
PG content 0.38 0.01 0.54* −0.19 0.23
Collagen orientation −0.20 −0.65** −0.22 −0.03 −0.23

Ef0 is the initial collagen network modulus, Efε the strain-dependent collagen network modulus, Enf the nonfibrillar matrix modulus, k0 the initial permeability and M the permeability strain-dependency factor.

*

p < 0.05

**

p < 0.01