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Table 1 The characteristic of the included studies

From: Prevalence and serotype distribution of nasopharyngeal carriage of Streptococcus pneumoniae in China: a meta-analysis

Author Sample year Location Population Pre/post vaccination period Vaccination history Number of participants Number of participants with pneumococcal carriage Quality scores
Guoling Ping [11] 2009 Beijing 12–18 months Post No 600 47 17
Yakun Liu [12] 2005 Hubei kindergarten Pre No 297 78 12
Yan Kang [13] 2010 Heilongjiang kindergarten Post N/A 100 23 13
Liping Zhang [14] 2011 Donguan 12–18 months Post No 600 115 14
Hongmei Yang [15] 2011 Hubei kindergarten & > 5 years Post N/A 301 66 14
Fan Yang [16] 1997–1998 Shanghai kindergarten Pre No 791 222 14
Yali Liu [17] 2009 National 12–18 months Post No 3635 451 15
Hao Li [18] 2000 Heinan kindergarten Pre No 571 151 12
Xiyuan Zhao [19] 2005 Zhongshan >5 years Pre No 327 25 11
Ancun Hou [20] 1995–2000 Beijing All age groups Pre No 307 57 16
Jun Liu [21] 2005 Shenyang kindergarten Pre No 110 14 11
Fuqin Li [22] 2005 Hebei kindergarten Pre No 100 24 12
Jianping Liang [23] 2003 Guangdong kindergarten Pre No 186 61 12
Mingzhi Di [24] 2010 Beijing All age groups Post 1.8%vaccinated 221 45 17
Yongming He [25] 2005 Guangdong kindergarten Pre No 350 121 12
Chunzhen Hua [26] 2004 Zhejiang kindergarten Pre No 1220 67 14
Sangjie Yu [27] 2000 Beijing kindergarten Pre No 502 190 19
Ziyong Sun [28] 2007 Wuhan kindergarten Pre No 605 135 16
Hong Zhou [29] 2002 Guangdong kindergarten Pre No 150 35 15
Lihua Zhang [30] 2005 Guangdong kindergarten Pre No 344 132 13
Hui Wang [31] 1999 Beijing kindergarten Pre No 985 244 16
Hui Chen [32] 2010 Guangdong kindergarten Post N/A 120 16 15
Jing Zhang [33] 2004 Wuhan kindergarten Pre No 469 116 14
Aiying Bai [34] 2010 Shandong 12–18 months Post No 611 57 16
Zhipeng Gao [35] 2012 Beijing kindergarten Post Half vaccinated 472 103 18
Benquan Wu [36] 2000 Guangdong kindergarten Pre No 220 53 17
Lihua Jiang [37] 2014 Guangxi kindergarten & > 5 years Post N/A 1475 148 18
Zhigang Lai [38] 2006 Guangdong kindergarten Pre No 344 132 15
Defeng Zhao [39] 2009 Wuhan 12–18 months Post No 596 75 18
Youqun Zeng [40] 2003 Chongqing All age groups Pre No 400 76 12
NY Lee [41] 1998–1999 Beijing kindergarten Pre No 267 100 17
Jiayu Hu [42] 2009 Shanghai 12–18 months Post No 614 102 18
Xiaoming Luo [43] 2002 Guangdong All age groups Pre No 199 60 12
Yanhui Liu [44] 2006 Guangdong kindergarten Pre No 400 138 11
Yanjie Liu [45] 2007 Liaoning kindergarten Pre No 130 17 10
Xinghua Cao [46] 2012 Heilongjiang kindergarten Post N/A 345 9 12
Dongke Chen [47] 1999 Beijing kindergarten Pre No 156 56 12