Table 4. Correlations between salivary and serum biomarker estimates.

Parameter	R
	Leukoplakia	Lichen-planus	Submucous fibrosis	Control
Serum and salivary TNF-α	0.72	0.74	0.72	0.78
Serum and salivary IL-6	0.78	0.78	0.82	0.81
Serum and salivary IL-8	0.81	0.78	0.79	0.82

(TNF-α: tumor necrosis factor alpha, IL: interleukin)

All data except 'Control' are P<0.05 as compared to control.