Table 1: Prevalence of Hp infection.

Author	Year	Region	N° patients	Hp in adults controls (%)	Hp in celiac adults (%)	Hp in children controls (%)	Hp in celiac children (%)
Feeley et al.	1998	Ireland	140	54.3	25.7	-	-
Diamanti et al.	1999	Italy	218	89	85	-	-
Luzza et al.	1999	Italy	162	-	-	17.3	18.5
Rostami-Nejad et al.	2009	Iran	450	86.2	82	-	-
Nenna et al.	2012	Italy	380	-	-	14.3	2.7
Pontone et al.	2012	Italy	260	24.3	17.5	21.5	3.3
Lebwohl et al.	2013	Texas	136,179	8.3	4.5	2.7	1.3
Guz-Mark et al.	2014	Israel	999	-	-	33.8	30.6