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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