|
Risk of bias assessment (yes/no/unclear) |
No. | Included studies (first author, year) | Random sequence generation | Allocation concealment | Blinding of participants, personnel, and outcome assessors | Incomplete outcome data | Selective outcome reporting | Other sources of bias |
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1 | Zheng et al. [19], 2019 | Randomization number table | Yes | Yes | Yes | No | No |
2 | Liu and Wang [42], 2016 | Randomization number table | Unclear | Unclear | Yes | No | No |
3 | Xu et al. [43], 2018 | Draw opaque envelope randomly | Yes | Yes | Yes | No | No |
4 | Zhu et al. [20], 2012 | Using a computer random number generator | Yes | Yes | Yes | No | No |
5 | Zhao et al. [21], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
6 | Yuan et al. [22], 2014 | Randomization number table | Unclear | Unclear | Yes | No | No |
7 | Huang [23], 2015 | Randomization number table | Unclear | Unclear | Yes | No | No |
8 | Wu et al. [24], 2005 | Randomization number table | Unclear | Unclear | Yes | No | No |
9 | Liu et al. [25], 2011 (3) | Randomization number table | Unclear | Unclear | Yes | No | No |
10 | Lu [47], 2014 | Doll’s clinical case random table | Unclear | Unclear | Yes | No | No |
11 | Han et al. [44], 2011 | Randomization number table | Unclear | Unclear | Yes | No | No |
12 | Liu et al. [26], 2011 (1) | Randomization number table | Unclear | Unclear | Yes | No | No |
13 | Peng et al. [48], 2017 | Randomization number table | Unclear | Unclear | Yes | No | No |
14 | Peng et al. [49], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
15 | Zhong et al. [50], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
16 | Zou et al. [53], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
17 | Ma et al. [45], 2018 | Drawing of lots | Unclear | Unclear | Yes | No | No |
18 | Lin [51], 2006 (1) | Randomization number table | Unclear | Unclear | Yes | No | No |
19 | Lin [52], 2006 (2) | Randomization number table | Unclear | Unclear | Yes | No | No |
20 | Qi [27], 2016 | Randomization number table | Unclear | Unclear | Yes | No | No |
21 | Li et al. [28], 2017 | Randomization number table | Unclear | Unclear | Yes | No | No |
22 | Hu and Li [29], 2012 | Randomization number table | Unclear | Unclear | Yes | No | No |
23 | Liu and Gong [30], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
24 | Chen et al. [31], 2017 | Coin tossing | Unclear | Unclear | Yes | No | No |
25 | Zou [32], 2016 | Randomization number table | Unclear | Unclear | Yes | No | No |
26 | Han [33], 2013 | Coin tossing | Unclear | Unclear | Yes | No | No |
27 | Huang et al. [34], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
28 | Huang et al. [35], 2017 | Randomization number table | Unclear | Unclear | Yes | No | No |
29 | Song et al. [36], 2015 | Draw lots randomly | Unclear | Unclear | Yes | No | No |
30 | Pan and Ding [37], 2014 | Randomization number table | Unclear | Unclear | Yes | No | No |
31 | Wang [38], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
32 | Gui et al. [39], 2017 | Randomization number table | Unclear | Unclear | Yes | No | No |
33 | Liu et al. [40], 2011 (2) | Randomization number table | Unclear | Unclear | Yes | No | No |
34 | Ouyang et al. [46], 2011 | Randomization number table | Unclear | Unclear | Yes | No | No |
35 | Zhou et al. [54], 2016 | Randomization number table | Unclear | Unclear | Yes | No | No |
36 | Xie et al. [41], 2018 | Randomization number table | Unclear | Unclear | Yes | No | No |
|