TABLE 1.

Correlation of salivary MMP‐8 biosensor (Δφ) with IFMA and ELISA assays in study population

MMP‐8 biosensor (Δφ) vs.	aMMP‐8 IFMA (ng/ml)		MMP‐8 ELISA (ng/ml)
Periodontal status	Spearman's rho	p‐value	Spearman's rho	p‐value
Healthy (n = 59)	0.252	.081	0.436	.002*
Gingivitis (n = 63)	0.138	.370	0.247	.106
Periodontitis (n = 67)	−0.068	.612	0.450	<.001*
Total (n = 189)	0.354	<.001*	0.681	<.001*

^*Significant; Spearman's rho (rank correlation test)