Table 2.

Demonstration of antibodies against HP-NAP in serum from H pylori-infected patients by ELISA n (%)

Patient group	Positivity for HP-NAP antibodies	Negativity for HP-NAP antibodies	Absorbance (mean ± 2SD) (cut-off value 0.78)	Range
Gastric cancer group (n = 43)	42 (97.7)	1 (2.3)	1.01 ± 0.24	0.748-1.269
Peptic ulcer group (n = 28)	26 (92.8)	2 (7.1)	0.98 ± 0.32	0.771-1.265
Chronic gastritis group (n = 28)	24 (85.7)	4 (14.3)	0.89 ± 0.14	0.711-1.122
Healthy persons (HP-IgG positive n = 47)	13 (27.7)	34 (72.3)	0.65 ± 0.18	0.451-0.948