Association between Helicobacter pylori infection and food-specific immunoglobulin G in Southwest China

Table 2 Prevalence of Helicobacter pylori infection and food-specific immunoglobulin G positivity in different age groups

Age in yr	Number	H. pylori infection, n (%)	Food-specific IgG positivity, n (%)
			Egg	Milk	Wheat
Male
18-29	903	296 (32.8)	409 (45.3)	188 (20.8)	126 (14.0)
30-39	3258	1292 (39.7)	858 (26.3)	350 (10.7)	167 (5.1)
40-49	4714	1835 (38.9)	746 (15.8)	256 (5.4)	126 (2.7)
≥ 50	3521	1525 (43.3)	512 (14.5)	188 (5.3)	71 (2.0)
Total	12396	4948 (39.9)	2525 (20.4)	982 (7.9)	490 (4.0)
Linear by linear association value		26.981	436.396	260.529	212.714
P value		< 0.001	< 0.001	< 0.001	< 0.001
Female
18-29	978	311 (31.8)	535 (54.7)	199 (20.3)	100 (10.2)
30-39	2747	1031 (37.5)	1102 (40.1)	361 (13.1)	197 (7.2)
40-49	3263	1355 (41.5)	795 (24.4)	250 (7.7)	198 (6.1)
≥ 50	1587	938 (38.5)	535 (21.9)	181 (7.4)	91 (3.7)
Total	9426	3635 (38.6)	2967 (31.5)	991 (10.5)	586 (6.2)
Linear by linear association value		12.391	462.821	143.539	54.716
P value		< 0.001	< 0.001	< 0.001	< 0.001

H. pylori: Helicobacter pylori; IgG: Immunoglobulin G.