Table 2.

Correlations between the tissue fragments and plasma content of OPG, FN, proMMP-2, and proMMP-9.

Marker	Reference tissue vs. plasma		Plaque vs. plasma
	R 2	P	R 2	P
OPG	0.07647	0.2379	0.00972	0.6792
FN	0.01620	0.5928	0.01960	0.5561
proMMP-2	0.16240	0.0781	0.01074	0.6637
proMMP-9	0.00317	0.8135	0.01833	0.5693