Table 1. Demographic and clinical characteristics of the included children according to the country of birth.

Variables	UK	Chile	Brazil	P value
	(n = 81)	(n = 105)	(n = 125)
Mean age ± (SD)	10.1 (3.6)	10.6 (3.1)	11.1 (2.9)	0.58
Female/Male	46/35	59/46	74/51	0.88
Indications for endoscopy
RAP (%)	65 (80.2)	84 (80.0)	102 (81.6)	0.95
GERD (%)	8 (9.9)	11 (10.5)	13 (10.4)	0.99
Vomiting (%)	3 (3.7)	9 (8.6)	4 (3.2)	0.14
Others* (%)	5 (6.2)	1 (0.9)	6 (4.8)	0.14
H. pylori-positivity (%)	6 (7.4)	33 (31.4)	47 (37.6)	<0.001

RAP, recurrent abdominal pain; GERD, gastroesophageal reflux disease; *diarrhea, weight loss.