Table 1.

Basic information of the studies included in the meta-analysis

First author	Publication year	Country	Location	Sample size	No. positive	Seroprevalence rate (%)	Assay method	Positive threshold	Age range	Group factors	AHRQ scores
Cheng [14]	2016	China	Jiangsu	420	125	29.76	NTA	1:8	0–15 yrs	Age, gender	8
Han [15]	2014	China	Shandong	1000	786	78.60	ELISA	OD450	0–31 yrs	Age, gender	8
Mao [16]	2009	China	Henan	337	123	36.50	NTA	1:8	7–30 mons	Age	7
Song [17]	2020	China	Tianjin	171	107	62.57	NTA	1:8	0–35 yrs	Age, gender	7
Ang [18]	2015	Singapore	Singapore	700	424	60.57	NTA	1:8	1–17 yrs	Age, gender, ethnic	9
Zhu [19]	2012	China	Jiangsu	1530	1024	66.93	NTA	1:8	all ages	Age	7
Lerdsamran [20]	2018	Thailand	Thailand	696	438	62.93	NTA	1:8	6–18 yrs	Age, gender	8
Rabenau [21]	2010	Germany	Germany	1378	989	71.77	NTA	1:8	all ages	Age, gender	8
Wang [22]	2016	China	Shandong	391	230	58.82	NTA	1:8	all ages	Age, gender	9
Wang [23]	2014	China	Jiangsu	715	400	55.94	NTA	1:8	20–50 yrs	Age, gender	9
Li [24]	2013	China	Guangdong	900	390	43.33	NTA	1:8	1–9 yrs	Age, gender	9
Zhu [25]	2010	China	Mixed	515	128	24.85	NTA	1:8	1–5 yrs	Age	8
Zhu [26]	2018	China	Fujian	230	176	76.52	NTA	1:8	all ages	Age, gender	8
Li [27]	2017	China	Tianjin	420	125	29.76	NTA	1:8	all ages	Age, gender	8