. 2017 Jan 31;5:e2937. doi: 10.7717/peerj.2937

Table 3. Comparison of prevalence of H. pylori infection among children in China.

Authors	Recruitment	Area	Year	Age (year)	Method	No.	Prevalence (%)
Ding et al. (2015)	Asymptomatic children	Beijing	2009–2011	Newborn	HpSA	330	0.6
		Guangzhou		1–12m		319	2.5
		Chengdu		1–3		289	2.1
				4–6		624	7.2
				7–9		528	6.1
				10–12		308	11.0
				13–15		685	8.0
				16–18		408	13.5
Tam et al. (2008)	School children	Hong Kong	2007	6–8	UBT	300	9.3
				9–10		301	11.0
				11–12		472	14.8
				13–14		779	13.0
				15–16		289	12.5
				17–19		339	16.5
Lin et al. (2007)	School children	Taiwan	2004	9–12	Serology	1,625	11.0
				13–15		325	12.3
Zhang et al. (2009a)	School children	Muping,	2006	8–9	HpSA	122	26.2
		Shandong		10–11		125	40.0
				12–13		142	41.6
				14–15		131	42.0
		Yanqing,	2006	8–9	HpSA	130	15.4
		Beijing		10–11		136	27.9
				12–13		125	29.6
				14–15		125	29.6
Chen et al. (2007)	Population-based cohort	Guangzhou	2003	3–5	Serology	180	19.4
		Guangdong		5–10		105	22.9
				10–20		185	36.8
Cheng et al. (2009)	Population-based cohort	Beijing	2003	2–10	UBT	19	57.8
				11–20		52	46.2
Shi et al. (2008)	Population-based cohort	Jiangsu	2004–2005	<20	UBT/Serology	48	60.4
Zhang et al. (2009b)	Population-based cohort	Wuwei,	2007–2008	3–5	HpSA	99	68.7
		Gansu		6–9		240	70.4
				10–14		440	73.0
				15–18		159	75.5
Zhang & Li (2012)	Gastrointestinal symptoms	Dongguan,	2010–2011	3–7	Histology/	119	39.5
		Guangdong		8–12	RUT/	134	41.0
				13–16	UBT	123	54.5
Wu et al. (2008)	Gastrointestinal symptoms	Zunyi	2000–2006	10–20	UBT	2,645	40.0
Our study	Gastrointestinal symptoms	Hangzhou,	2007–2014	3–6	UBT	5,408	14.8
		Zhejiang		7–11		5,829	20.2
				12–17		1,559	25.8

Notes.