Table 3. Prevalence of H. pylori infection in different subgroups.

Group		Article N	Total subjects N	Hp(+) N	Prevalence of H. pylori, 95% CI
Total		22	178033	70761	0.42 [0.37, 0.47]
Test method		22	178033	70761	0.42 [0.37, 0.47]
	UBT	15	130987	55278	0.41 [0.38, 0.45]
	Other	7	47046	15483	0.44 [0.32, 0.56]
Region		22	178033	70761	0.42 [0.37, 0.47]
	First-tier city	6	84087	34177	0.45 [0.39, 0.51]
	Other city	16	93946	36584	0.41 [0.34, 0.48]
Gender		18	167310	66612	0.42 [0.38, 0.46]
	Male	18	96571	38234	0.44 [0.38, 0.49]
	Female	18	70739	28378	0.41 [0.35, 0.46]
Age		5	15475	5181	0.47 [0.38, 0.56]
	≤40	3	3496	1039	0.42 [0.24, 0.60]
	40–60	3	8976	3081	0.46 [0.24, 0.67]
	≥60	5	3003	1220	0.51 [0.32, 0.70]
Body shape		9	42490	17354	0.47 [0.43, 0.51]
	Normal	8	21540	8489	0.43 [0.37, 0.50]
	Overweight	8	15449	6497	0.47 [0.39, 0.55]
	Obese	9	5326	2294	0.51 [0.42, 0.59]