Table 2 Quality assessment of included 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 |