Table 2.

Association between chronic urticaria (CU) and H. pylori infection in the literature

Reference	Country	Year	Total number of patients with CU	Number of H. pylori positive patients (%)	Urticaria remission after eradication (%)
Bohmeyer et al. [25]	Germany	1996	10	8 (80)	8/8 (100)
Tebbe et al. [34]	Germany	1996	25	17 (68)	14/17 (82.3)
Valsecchi et al. [45]	Italy	1998	125	31 (62)	3/29 (10)
Di Campli et al. [9]	Italy	1998	42	18 (42.8)	13/16 (81.2)
Ozkaya-Bayazit et al. [35]	Turkey	1998	35	23 (65.7)	5/17 (29.4)
Bonamigo et al. [36]	Brazil	1999	18	18 (100)	10/12 (83.3)
Daudén et al. [37]	Spain	2000	25	15 (60)	8/14 (57)
Erel et al. [44]	Turkey	2000	38	29 (76)	1/25 (4)
Sakurane et al. [38]	Japan	2002	50	Not stated	Not stated
Fukuda et al. [39]	Japan	2004	50	19 (38)	17/17 (100)
Magen et al. [40]	Israel	2007	78	45 (57.7)	Not stated
Yadav et al. [41]	India	2008	68	48 (70.58)	39/48 (81.2)
Akashi et al. [42]	Japan	2011	82	25 (30.5)	Not stated
Chiu et al. [43]	Taiwan	2013	14	11 (78.6)	8/11 (72.7)
This study	Iran	2014	100	36 (36)	24/33 (72.7)