Table 1. Demographic characteristics of the 12,796 subjects.

	H. pylori-positive	H. pylori-negative	Total	P value
Age groups (years)
3–6	800 (14.8)	4,608 (85.2)	5,408	<0.001
7–11	1,179 (20.2)	4,650 (79.8)	5,829
12–17	403 (25.8)	1,156 (74.2)	1,559
Gender
Female	1,016 (17.2)	4,900 (82.8)	5,916	<0.001
Male	1,366 (19.9)	5,514 (80.1)	6,880
Gastrointestinal symptoms
No	432 (17.5)	2,034 (82.5)	2,466	0.119
Yes	1,950 (18.9)	8,380 (81.1)	10,330
History of H. pylori infected family member
No	2,139 (18.4)	9,488 (81.6)	11,627	0.045
Yes	243 (20.8)	926 (79.2)	1,169
Total	2,382 (18.6)	10,414 (81.4)	12,796	–

Notes.

Data expressed as number (%).