Table 2 Assessment of methodological quality of included studies
Author | Random allocation | Hidden distribution | Blind method | Incomplete Outcome Data | Selective reporting of results | Other bias | Quality grade |
|---|---|---|---|---|---|---|---|
Li [21] | Randomized | No clear | No clear | Low | Low | Low | B |
Tian [22] | Randomized | No clear | No clear | Low | Low | Low | C |
Xu [23] | Randomized | No clear | No clear | Low | Low | Low | B |
Yang [24] | Randomized | No clear | No clear | Low | Low | Low | B |
Zhang [25] | Randomized | No clear | No clear | Low | Low | Low | B |
Chen 1 [26] | Randomized | No clear | No clear | Low | Low | Low | B |
Chen 2 [27] | Randomized | No clear | No clear | Low | Low | Low | C |
Fu [28] | Randomized | No clear | No clear | Low | Low | Low | C |
Li [29] | Randomized | No clear | No clear | Low | Low | Low | C |
Liu [30] | Randomized | No clear | No clear | Low | Low | Low | B |
Wan [31] | Randomized | No clear | No clear | Low | Low | Low | C |
Wei [32] | Randomized | No clear | No clear | Low | Low | Low | B |
Yu [33] | Randomized | No clear | No clear | Low | Low | Low | C |
Zhang [34] | Randomized | No clear | No clear | Low | Low | Low | B |
Zou [35] | Randomized | No clear | No clear | Low | Low | Low | C |
Ding [36] | Randomized | No clear | No clear | Low | Low | Low | B |
Jin [37] | Randomized | No clear | No clear | Low | Low | Low | B |
Li 1 [38] | Randomized | No clear | No clear | Low | Low | Low | B |
Li 2 [39] | Randomized | No clear | No clear | Low | Low | Low | B |
Liu [40] | Randomized | No clear | No clear | Low | Low | Low | B |
Qian [41] | Randomized | No clear | No clear | Low | Low | Low | B |
Wang [42] | Randomized | No clear | No clear | Low | Low | Low | B |
Yang 1 [43] | Randomized | No clear | No clear | Low | Low | Low | B |
Yang [44] | Randomized | No clear | No clear | Low | Low | Low | B |
You [45] | Randomized | No clear | No clear | Low | Low | Low | B |
Zang [46] | Randomized | No clear | No clear | Low | Low | Low | B |
Zhai [47] | Randomized | No clear | No clear | Low | Low | Low | B |
Zheng [48] | Randomized | No clear | No clear | Low | Low | Low | B |
Zuo [49] | Randomized | No clear | No clear | Low | Low | Low | B |
Bai [50] | Randomized | No clear | No clear | Low | Low | Low | C |
Bao [51] | Randomized | No clear | No clear | Low | Low | Low | C |
Chen [52] | Randomized | No clear | No clear | Low | Low | Low | B |
Fusco [53] | Randomized | No clear | Double-Blind | Low | Low | Low | B |
Guo 1 [54] | Randomized | No clear | No clear | Low | Low | Low | B |
Guo 2 [55] | Randomized | No clear | No clear | Low | Low | Low | B |
He [56] | Randomized | No clear | No clear | Low | Low | Low | B |
Huang [57] | Randomized | No clear | Double-Blind | Low | Low | Low | B |
Jia [58] | Randomized | No clear | No clear | Low | Low | Low | C |
Jiang [59] | Randomized | No clear | No clear | Low | Low | Low | B |
Jin 1 [60] | Randomized | No clear | No clear | Low | Low | Low | B |
Jin 2 [61] | Randomized | No clear | No clear | Low | Low | Low | B |
Li [62] | Randomized | No clear | No clear | Low | Low | Low | B |
Liang [63] | Randomized | No clear | No clear | Low | Low | Low | B |
Liu [64] | Randomized | No clear | No clear | Low | Low | Low | B |
Sun [65] | Randomized | No clear | No clear | Low | Low | Low | B |
Xiao [66] | Randomized | No clear | Double-Blind | Low | Low | Low | A |
Yang [67] | Randomized | No clear | No clear | Low | Low | Low | B |
Yu [68] | Randomized | No clear | No clear | Low | Low | Low | B |
Zhang [69] | Randomized | No clear | No clear | Low | Low | Low | B |
Zhu [70] | Randomized | No clear | No clear | Low | Low | Low | B |
Borges [71] | Randomized | No clear | No clear | Low | Low | Low | B |
Du [72] | Randomized | No clear | Single-Blind | Low | Low | Low | A |
Ge [73] | Randomized | No clear | No clear | Low | Low | Low | C |
Jiang [74] | Randomized | No clear | No clear | Low | Low | Low | C |
Liang [75] | Randomized | No clear | No clear | Low | Low | Low | B |
Yu [76] | Randomized | No clear | No clear | Low | Low | Low | B |
Zheng [77] | Randomized | No clear | No clear | Low | Low | Low | B |