Table 2.

The number of subjects by age grades with H. pylori infection and PCR-positive for H. pylori in samples obtained from oral cavity

	Presence of H. pylori
	Age – grades
	20~49	50~59	60~69	70~	Total
	n = 60	n = 21	n = 35	n = 76	n = 192
Samples
Urine	0 (0%)	2 (10%)	5 (14%)	18 (24%)	25 (13%)
Dental pulp	0 (0%)	1 (5%)	4 (11%)	18 (24%)	23 (12%)
Dental plaque	0 (0%)	0 (0%)	0 (0%)	2 (3%)	2 (1%)
Saliva	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)