TABLE 1.

Characteristics of the study population of 58 dyspeptic patients from Tennessee

Characteristic	Value for group
	H. pylori negative	H. pylori positive, by vacA genotype
		s2/m2	s1/m2	s1/m1
Total subjects	19	8	12	19
Mean age ± SEM (yr)	52.3 ± 3.0	52.9 ± 3.9	61.5 ± 3.3	57.8 ± 3.2
Seropositive for CagA antibodies (%)	0	0	75.0	77.8
With peptic ulcer (%)	15.8	25.0	75.0	52.6