Table 1 Quality assessment of included studies
Study | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data addressed | Selective reporting | Other Bias |
|---|---|---|---|---|---|---|---|
Murphy et al., 2015 [30] | Low Risk | Low Risk | Low Risk | Low Risk | Middle Risk | Low Risk | Low Risk |
Lin et al., 2014 [31] | Low Risk | High Risk | Low Risk | Low Risk | Low Risk | Low Risk | Low Risk |
Eloff et al., 2014 [12] | Low Risk | Low Risk | Low Risk | Low Risk | Middle Risk | Low Risk | Low Risk |
Rochat et al., 2014 [32] | Low Risk | High Risk | Low Risk | Low Risk | Low Risk | Low Risk | Low Risk |
Keypour et al. 2011 [33] | High Risk | High Risk | Low Risk | Low Risk | Low Risk | Low Risk | Middle Risk |
Kumakech et al., 2009 [16] | Low Risk | Low Risk | Low Risk | Low Risk | Low Risk | Low Risk | Middle Risk |
Kaufman et al., 2013 [34] | High Risk | High Risk | Low Risk | Low Risk | Low Risk | Low Risk | Middle Risk |
O’Donnell et al., 2014 [35] | High Risk | High Risk | Low Risk | Low Risk | Low Risk | Low Risk | Low Risk |