Table 2.
Risk of Bias Summary—based on GRADE [24].
| Study | Random Sequence Generation | Allocation Concealment | Blinding of Outcome Assessment | Incomplete Outcome Data | Selective Reporting | Other Reporting Bias |
|---|---|---|---|---|---|---|
| Fergusson 2005 [28] |
Low | High | High | High | Low | Low |
| Fergusson 2006 [27] |
Low | High | High | High | Low | Low |
| Naven 2012 [29] |
High | High | Unclear | High | Low | Low |
| Naven 2013 [30] |
High | High | Unclear | High | Low | Low |
| Reading 2001 [31] |
High | High | Unclear | High | Low | Low |
| Parthasarathy 2003 [32] | High | High | Unclear | High | Low | Unclear |