Table 2.
Cochrane Risk of Bias of Included Randomized Clinical Trials
| First Authorref (Year) | Yeh38 (2011) | Yeh34 (2010a) | Wang36 (2000) | Li35 (2008) | Yeh37 (2010b) |
|---|---|---|---|---|---|
| 1. Random sequence generation (selection bias) | L (computerized randomization) | U | U | U | L (randomization list) |
| 2. Allocation concealment (selection bias) | L (mentioned) | L (mentioned) | U | U | U |
| 3. Blinding of participants and personnel (performance bias) | L (patient blind) | L (patient blind) | L (patient blind) | U | L (mentioned) |
| 4. Blinding of outcome assessment (detection bias) | L (mentioned) | L (mentioned) | L (mentioned) | U | U |
| 5. Incomplete outcome data (attrition bias) | L (mentioned) | U | U | U | L (Mentioned) |
| 6. Selective reporting (reporting bias) | U | U | U | U | U |
| 7. Other bias | L | L | H | L | L |
Risk of bias: H, high risk of bias; L, low risk of bias; U, unclear.