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Table 2 Quality assessment of included studies

From: Awareness and knowledge about human papillomavirus vaccination and its acceptance in China: a meta-analysis of 58 observational studies

Studies 1 2 3 4 5 6 7 Scores Grade
Huang He, 2013 [33] 1 1 1 1 1 1 1 7 A
Ma Xiaojing, 2013 [12] 1 1 0 1 1 1 1 6 A
He Mei, 2011 [41] 1 0 0 0 1 1 1 4 B
Cui Bo, 2010 [13] 1 1 1 1 1 1 1 7 A
He Xin, 2010 [29] 1 1 1 1 1 1 1 7 A
Xu Jing, 2014 [11] 1 1 1 1 1 1 1 7 A
Feng Suwen, 2010 [46] 1 1 0 1 1 1 1 6 A
Yan Jun, 2013 [43] 1 1 0 1 1 1 1 6 A
Long Xiange, 2011 [21] 1 0 1 0 1 1 1 5 B
Hu Haishan, 2014 [28] 1 1 0 1 1 1 1 6 A
Wu Ying, 2011 [25] 1 0 1 1 1 1 1 6 A
Li Juan, 2011 [14] 1 1 1 1 1 1 1 7 A
Fan Baojian, 2009 [23] 1 0 1 1 1 1 1 6 A
Xiao Wei, 2009 [45] 1 1 0 0 1 1 1 5 B
Wang Xuemin, 2012 [15] 1 1 0 1 1 1 1 6 A
Shao Shujuan, 2013 [17] 1 0 0 1 1 1 1 5 B
Xu Wenyu, 2013 [18] 1 1 1 0 1 1 1 6 A
Ma Dong, 2013 [40] 1 1 1 0 1 1 1 6 A
Zhou Lixia, 2011 [42] 1 1 1 1 1 1 1 7 A
Huang Yanhua, 2014 [39] 1 0 1 1 1 1 1 6 A
Wang Haiqiu, 2011 [31] 1 1 1 0 1 1 1 6 A
Ma Dong, 2012 [30] 1 1 1 0 1 1 1 6 A
Yao Chenglian, 2012 [19] 1 0 0 1 1 1 1 5 B
Xamxinuer Ablimit, 2009 [26] 1 1 0 0 1 1 1 5 B
Xu Lina, 2013 [22] 1 1 0 1 1 1 1 6 A
Zhang Hui,2014 [37] 1 1 1 1 1 1 1 7 A
Yu Jing, 2013 [44] 1 1 0 1 1 1 1 6 A
Guzalnur Abduxkur, 2012 [32] 1 1 0 0 1 1 1 5 B
Cai Jing, 2013 [24] 1 1 0 1 1 1 1 6 A
Li Li, 2010 [27] 1 1 0 1 1 1 1 6 A
Ying Wen, 2014 [35] 1 1 1 1 1 1 1 7 A
Zhang Shaokai, 2013 [38] 1 1 1 1 1 1 1 7 A
Wang Shaoming, 2014 [20] 1 1 1 1 1 1 1 7 A
Yan Hong, 2013 [16] 1 1 0 1 1 1 1 6 A
Li Jing, 2009 [34] 1 1 1 1 1 1 1 7 A
Zhao Fanghui, 2012 [36] 1 1 0 1 1 1 1 6 A
Ayizuoremu · mutailipu, 2015 [64] 1 1 0 1 1 1 1 6 A
Zeng Xiaomin, 2015 [55] 1 0 1 1 1 1 1 6 A
Wang Ling, 2015 [49] 1 1 0 1 1 1 1 6 A
Liu Qiong, 2015 [57] 1 1 1 1 1 1 1 7 A
She Qian, 2015 [59] 1 1 1 1 1 1 1 7 A
Chen Ling, 2015 [50] 1 1 1 1 1 1 1 7 A
Cheng Lihong, 2015 [51] 1 1 1 1 1 1 1 7 A
Zhu Qiaoyang, 2015 [58] 1 0 1 1 1 1 1 6 A
Lei Juhong, 2015 [61] 1 1 1 1 1 1 1 7 A
Zhao Bixia, 2015 [63] 1 0 1 1 1 1 1 6 A
Xie Wenliu, 2015 [48] 1 1 1 1 1 1 1 7 A
Zhou Yanqiu, 2015 [47] 1 1 1 1 1 1 1 7 A
Meng Liping, 2015 [60] 1 1 1 1 1 1 1 7 A
Zou Huachun, 2015 [53] 1 1 1 1 1 1 1 7 A
Zou Huachun, 2015 [52] 1 1 1 1 1 1 1 7 A
Gu Can, 2015 [62] 1 1 0 1 1 1 1 6 A
Wang Wei, 2015 [56] 1 1 1 1 1 1 1 7 A
Abida Abudukadeer, 2015 [65] 1 1 1 1 1 1 1 7 A
Zhang Shaokai, 2015 [54] 1 1 0 1 1 1 1 6 A
Pan Xiongfei, 2015 [66] 1 1 1 1 1 1 1 7 A
Fu Chunjing, 2015 [67] 1 1 1 1 1 1 1 7 A
Hu Shangying, 2105 [68] 1 1 0 1 1 1 1 6 A
  1. For the second index; “data collection strategy”, we considered the study as reasonable when it satisfied one of the following criteria: 1) study purpose and survey contents were explained to participants before the survey, 2) investigators reviewed the questionnaire in terms of the clarity of language and completeness of the questionnaire
  2. For the fourth index, “representativeness of the sample,” we recognized the sample as a good representative when it met one of the following requirements: 1) specific inclusion and exclusion criteria were provided, 2) a reasonable sampling method was used