Different antibiotic susceptibility between antrum and corpus of the stomach, a possible reason for treatment failure of Helicobacter pylori infection

Table 2 Antibiotic resistance of Helicobacter pylori strains depending on the number of eradication therapies n (%)

	Patients with resistant Helicobacter pylori strains	95%CI
No previous eradication therapy (n = 29)
Clarithromycin	2 (6.9)	0.03-0.18
Metronidazole	5 (17.2)	0.03-0.34
Levofloxacin	4 (13.8)	0.02-0.24
One previous eradication therapy (n = 13)
Clarithromycin	7 (53.8)	0.30-0.98
Metronidazole	9 (69.2)	0.30-0.98
Levofloxacin	3 (23.1)	0.04-0.59
Two or more previous eradication therapies (n = 24)
Clarithromycin	20 (83.3)	0.63-0.97
Metronidazole	20 (83.3)	0.69-0.99
Levofloxacin	8 (33.3)	0.09-0.47
Rifabutin	3 (12.5)	0.04-0.12