TABLE 3.

Prevalence of vacA m subtypes by vacA m-specific ELISAs in serum obtained from gastric cancer patients and matched controls

VacA antigen and analysis and study subject characteristic(s)a	No. of pairs	% Positivec
		Controls	Patients
P44M1
All	141	42	47
All H. pylori positive	87	52	48
All H. pylori or CagA positive	90	51	48
All H. pylori positive and CagA positive	47	53	53
P44M2-modifiedb
All	45	20	15
All H. pylori positive	23	26	30
All H. pylori or CagA positive	24	25	29
All H. pylori positive and CagA positive	11	18	27
P55M2-modifiedb
All	45	47	47
All H. pylori positive	23	61	61
All H. pylori or CagA positive	24	62	62
All H. pylori positive and CagA positive	11	54	54

^aCharacteristics based on prior analyses (30).

^bExcludes samples with a positive serologic response to P44M1 antigen.

^cAll P > 0.5.