Table 2.

Frequency distribution of Helicobacter pylori infection by sex, place of residence, and age group of children

Variable		Not infected		Infected		P-value
		Number	Percent	Number	Percent
Gender	Girl	185	95.4	9	4.6	0.02*
	Boy	184	89.3	22	10.7
Age group	<1 year	111	98.2	2	1.8	<0.001**
	2-6 years	87	93.5	6	6.5
	7-10 years	91	91	9	9
	>10 years	80	85.1	14	14.9
Residence place	Isfahan	211	94.2	13	5.8	0.03*
	Isfahan suburb	126	92	11	8
	Other	32	82.1	7	17.9

^*Using chi-square test;

^**using Mann-Whitney U test.