Table 2.

Relationships among mean clinical parameters, mean levels of GCF biomarkers, and mean % of total DNA probe count of each subgingival microbial complex

Spearman rank correlation coeficients
Clinical parameters:	GCF Biomarkers			Microbial Complexes
	IL-1	IL-8	MMP-8	Purple	Yellow	Green	Orange	Red
mean pocket depth (mm)	0.75 ‡	0.54 ‡	NS	−0.60	−0.58 ‡	−0.46 †	0.40 †	0.73 ‡
mean recession (mm)	0.74 ‡	0.52 ‡	0.41 †	−0.57	−0.57 ‡	−0.47 †	0.53 ‡	0.63 ‡
% BOP	0.75 ‡	0.65 ‡	0.39 *	−0.65 ‡	−0.64 ‡	−0.48 †	0.48 †	0.72 ‡
% plaque	0.81 ‡	0.63 ‡	NS	−0.51	−0.54 ‡	−0.43 †	0.54 ‡	0.67 ‡
% gingival redness	0.74 ‡	0.70 ‡	0.50 ‡	−0.59 ‡	−0.62 ‡	−0.35 *	0.52 ‡	0.67 ‡
GCF volume (ul)	0.86 ‡	0.66 ‡	0.39 *	−0.51 ‡	−0.74 ‡	−0.51 ‡	0.49 †	0.80 ‡

^*p<0.05,

^†p<0.01 and

^‡p<0.001

NS - non significant.