Detection of H pylori infection by ELISA and Western blot techniques and evaluation of anti CagA seropositivity in adult Turkish dyspeptic patients

Table 3 Results of anti-H pylori ELISA and CagA ELISA of IgA, IgG in dyspeptic patients

	Sensitivity%	Specificity%	PPV%	NPV%	LR +	LR -	Diagnosticaccuracy %
ELISA IgA	54.2	87.5	96.3	24.1	0.62	4.33	58.9
ELISA IgG	87.5	50	91.3	40	1.75	1.75	82.1
CagA ELISA IgA	33.3	87.5	94.1	18	0.38	2.67	41.1
CagA ELISA IgG	54.2	75	92.9	21.4	0.72	2.17	57.1

PPV: Positive predictive value; NPV: Negative predictive value; LR: Likelihood ratio.