Table 2.
Risk of bias table (High +, Low −, Unclear ?).
| Author (Year) | Random Sequence Generation | Allocation Concealment | Selective Reporting | Other Sources of Bias | Blinding | Incomplete Outcome Data |
|---|---|---|---|---|---|---|
| Coello-Gomez et al. (2018) [20] | - | - | - | ? | - | - |
| Sinjari et al. (2018) [21] | ? | ? | - | ? | + | - |
| Rusu et al (2017) [22] | - | - | - | - | - | - |
| Rubio-Palau et al. (2015) [23] | - | - | - | ? | - | - |
| Levin et al. (2015) [24] | - | - | - | - | + | - |
| Jesudasan et al. (2015) [25] | + | - | - | - | + | - |
| Haraji et al. (2015) [26] | - | - | - | ? | + | - |
| Freudhental et al. (2015) [27] | - | - | - | ? | - | - |
| Diaz-Sanchez et al. [28] | - | - | - | - | - | - |
| Haraji et al. (2014) [29] | - | + | - | - | + | - |
| Singh et al. (2013) [30] | - | - | - | ? | - | - |
| Pukallus et al. (2013) [31] | - | - | - | - | + | - |
| Lima et al. (2013) [32] | - | - | - | ? | + | - |
| De Siena et al. (2013) [33] | - | - | - | - | + | - |
| De Lucena et al. (2013) [34] | - | - | - | - | + | - |
| Almeida et al. (2012) [35] | - | - | - | - | + | - |
| Heitz-Mayfield et al. (2011) [36] | - | - | - | ? | - | - |
| Torres-Lagares et al. (2010) [37] | - | - | - | - | - | - |
| Slot et al. (2010) [40] | - | - | - | ? | - | - |
| Lopez-Jornet et al. (2010) [41] | + | - | - | - | + | - |
| Cabov et al. (2010) [42] | - | - | - | ? | - | - |
| Paolantonio et al. (2009) [43] | - | - | - | ? | + | - |
| Malkhassian et al. (2009) [44] | - | - | - | ? | - | - |
| Hauser-Gerspach et al. (2009) [45] | - | - | - | ? | + | - |
| Gomes et al. (2009) [46] | - | - | - | ? | + | - |