Table 2.

H. pylori infection rates in different age groups of UGID patients from 2003 to 2012

Age groups	Hp infection rates (%)
	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012
≤19	39.07	33.47	33.33	34.71	36.77	33.43	30.55	23.73	25.45	20.60
20–29	46.41	42.61	39.57	38.57	38.91	33.97	33.52	31.26	30.14	24.29
30–39	43.55	41.01	36.60	39.19	38.32	33.63	30.78	30.08	28.48	27.68
40–49	45.04	42.13	35.76	39.04	37.61	33.44	29.60	31.63	27.03	25.01
50–59	41.61	40.52	34.07	36.20	35.34	29.73	27.50	27.04	24.34	24.04
60–69	37.78	37.78	30.74	34.13	31.08	28.07	26.37	23.82	21.22	20.53
≥70	36.40	36.90	29.83	32.91	28.33	24.68	27.75	22.69	19.76	17.53

Cochran–Mantel–Haenszel Chi square test was used to evaluate the liner trend of H. pylori infection rates in age groups between 2003 and 2012

Hp H. pylori