Table 2. Comparison of periodontal indices average values in OLP and L groups in patients with (+) and without (-) the presence of H. pylori DNA.

	H. pylori +	H. pylori -	Statistical importance
GROUP OLP	N=17	N=55
API	26.4%	26.5%	p=0.947
BOP	25.5%	22.5%	p=0.139
PD	2.88 mm	2.22 mm	p=0.003
GROUP L	N=11	N=43
API	35.5%	31.7%	p=0.030
BOP	32.4%	26.5%	p=0.024
PD	3.36 mm	2.33 mm	p=0.000

Non-parametrical Kruskal-Wallis test

API=Approximal Plaque Index

BOP=Bleeding on Probing

PD=Pocket Depth