Table 3: Risk of bias assessment using cochrane collaboration risk of bias tool.
|
Study |
Random sequence generation (Selection Bias) |
Allocation concealment (Selection Bias) |
Selective reporting (Reporting Bias) |
Blinding participants and personnel (Performance Bias) |
Blinding outcome assessment (Detection Bias) |
Incomplete outcome data (Attrition Bias) |
|
Xing, et al. [4] |
(+) |
(+) |
(+) |
(+) |
(?) |
(+) |
|
Gohari, et al. [29] |
(?) |
(+) |
(+) |
(+) |
(?) |
(?) |
|
Chiaretti, et al. [30] |
(+) |
(?) |
(?) |
(?) |
(?) |
(?) |
(+) = Low risk of bias; (?) = Unclear risk of bias; (-) = High risk of bias.