First author (year) | Design of included studies | Level of evidence | Software | GRADE use | Sensitivity analysis |
---|---|---|---|---|---|
Khan RJ (2005) | RCT or quasi-RCT | Level II | NA | No | No |
Khan RJ (2010) | RCT or quasi-RCT | Level II | NA | No | No |
McMahon SE (2011) | RCT or quasi-RCT | Level II | RevMan | No | No |
Jones MP (2012) | RCT or quasi-RCT | Level II | NA | No | No |