Variability in Prevalence of Helicobacter pylori Strains Resistant to Clarithromycin and Levofloxacin in Southern Poland : Table 2

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⁾


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.