Table 2.

Correlation analysis for concentrations of IL-1 and MMP-8 in periodontitis patients and healthy controls

Variable 1	Variable 2	Pearson correlation	p value
IL-1 β healthy	MMP-8 healthy	0.178	0.509
IL-1 β shallow	MMP-8 shallow	0.309	0.031
IL-1β deep	MMP-8 deep	0.167	0.252