| Study | Sequence Generation | Allocation Concealment | Blinding | Incomplete Outcomes Data | Selective Reporting Bias | Other Sources of Bias |
|---|---|---|---|---|---|---|
| Majid (2011) | YES | YES | NO | NO | NO | YES |
| Majid and Mahmood (2011) | YES | YES | NO | NO | NO | YES |
| Majid and Mahmood (2013) | YES | YES | NO | NO | NO | YES |
| Barghava (2014) | UNCLEAR | UNCLEAR | YES | NO | NO | NO |