Table 2. Risk of Bias Assessment of Included Studies.
Article | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias | Risk of bias |
Manuela 2007(Brazil) | low | low | low | low | low | low | high | high |
Monica 2010 (Norway) | low | low | low | low | low | low | high | high |
Fabio 2010 (Brazil) | low | low | unclear | low | low | low | high | high |
Ottar 2010 (Norway) | low | unclear | low | low | low | low | high | high |
Padmini 2008 (India) | low | low | high | low | low | low | high | high |