Table 4.

Spearman rank correlation coefficient according to degree of disc degeneration/facet joint degeneration and expression of collagen type I, III, and elastin

	Facet joint capsules (PAsup + PAinf)			Ligament flavum (LFmed + LFlat)
	Collagen I	Collagen III	Elastin	Collagen I	Collagen III	Elastin
Degree of disc degeneration (Pfirrmann)	rs = 0.37 P = 0.33	rs = 0.5 P = 0.14	rs = 0.03 P = 0.94	rs = 0.46 P = 0.22	rs = 0.56 P = 0.09	rs = −0.55 P = 0.1
Degree of facet joint degeneration (Fujiwara)	rs = −0.46 P = 0.22	rs = 0.63 P = 0.051	rs = 0.31 P = 0.39	rs = −0.55 P = 0.13	rs = 0.11 P = 0.77	rs = −0.29 P = 0.43