Table 2.

Comparison of resistance of H. pylori strains to clarithromycin and levofloxacin between 2006–2008 [13] and 2009–2011.

Antimicrobial agent	No. (%) of H. pylori-resistant strains
	2006–2008 [13]	2009–2011	P value(1)
	n = 115	n = 51
CLA(2)	39 (34%)	11 (22%)	0,16 NS(3)
LEV(2)	6 (5%)	8 (16%)	0,05(4)

⁽¹⁾ P value (chi-square test) with the Yates correction. P≤ 0.05 was deemed statistically significant.

⁽²⁾CLA: clarithromycin, LEV: levofloxacin.

⁽³⁾NS: non significant.

⁽⁴⁾Statistically significant differences between the level of resistance in the years 2006–2008 and 2009–2011.