Table 4.

H. pylori eradication rates by past drug exposure

Baseline category	Group	Number of patients	Eradicated		Treatment failure
			n	%	n	%
Clarithromycin exposure in the previous 2 years	Exposed	10	10	100	0	0
	Not exposed	141	120	85	21	15
Other antibiotic exposure in previous 6 months	Exposed	5	4	80	1	20
	Not exposed	146	126	86	20	14
PPI exposure in previous 2 months	Exposed	50	43	86	7	14
	Not exposed	101	87	86	14	14

Abbreviations: H. pylori, Helicobacter pylori; PPI, proton pump inhibitor.