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. 2012 Oct 12;13:195. doi: 10.1186/1471-2474-13-195

Table 5.

Coefficient of determination R2, standard error of estimate (MPa for E and HA0, e-15m4/Ns for kr, k0 and ka) and power of the performed test with α=0.05 of the multilinear regressions between the mechanical properties and the MRI parameters for the nucleus pulposus and the annulus fibrosus

Coefficient of determination R2 Standard error of estimate Power with α=0.05 E kr HA0 k0 ka
Nucleus Pulposus
In-situ
 0.48
 0.53
 0.48
 0.49
 0.70
0.04
 55.6
 0.08
 73.4
 1.2
0.73
 0.79
 0.72
 0.74
 0.95
Digested-6h
 0.48
 0.62
 0.34
 0.45
 0.67
0.007
 34.6
 0.06
 15.6
 2.2
0.67
 0.85
 0.47
 0.63
 0.90
Digested-18h
 0.68
 0.62
 0.45
 0.34
 0.55
0.01
 151.9
 0.05
 21.9
 2.1
0.91
 0.85
 0.63
 0.48
 0.76
Digested-24h
 0.65
 0.63
 0.27
 0.38
 0.41
0.006
 173.7
 0.03
 24.5
 3.2
0.91
 0.90
 0.41
 0.58
 0.63
Annulus Fibrosus
In-situ
 0.52
 0.17
 0.65
 0.65
 0.48
0.03
 9.8
 0.14
 40.4
 3.6
0.78
 0.26
 0.91
 0.88
 0.73
Digested-6h
 0.15
 0.52
 0.49
 0.39
 0.45
0.02
 41.7
 0.06
 62.5
 2.1
0.21
 0.73
 0.72
 0.49
 0.63
Digested-18h
 0.70
 0.66
 0.63
 0.32
 0.48
0.01
 13.1
 0.03
 266.2
 2.2
0.92
 0.89
 0.86
 0.44
 0.68
Digested-24h 0.01
 0.80
 0.21
 0.32
 0.71
0.93
 35.1
 0.07
 34.1
 1.6
0.67 0.99 0.32 0.48 0.95