Table 3.

Previous rescue regimens used to treat H. pylori infections

Regimen	A	B	C	D	E	F
n (%)	2 (4.0)	6 (12.0)	3 (6.0)	2 (4.0)	3 (6.0)	34 (68.0)

A: Repeated use of the original regimen; B: Repeated use of clarithromycin or levofloxacin; C: Repeated use of metronidazole without dose optimization; D: Use of clarithromycin- or metronidazole-containing triple therapy without drug sensitivity testing; E: Use of antibiotics not in the recommended guidelines (gentamicin, erythromycin, or cefaclor); F: Use of a regimen meeting the normalization principle recommended by the Fifth Chinese National Consensus Report on the Management of Helicobacter pylori Infection.[4]