Study |
Year of publication |
Random sequence generation |
Allocation concealment |
Blinding of participants and personnel |
Blinding of outcome assessment |
Incomplete outcome data |
Selective reporting |
Other sources of bias |
---|---|---|---|---|---|---|---|---|
Kuchler et al. [14] | 2011 | + | + | + | ? | + | + | + |
Mozzati et al. [15] | 2015 | - | + | + | + | + | + | + |
Holahan et al. [16] | 2009 | - | + | + | + | - | + | + |
Shibli et al. [17] | 2007 | - | ? | + | + | + | + | + |
Kwon et al. [18] | 2012 | - | - | ? | + | + | + | + |
Siebert et al. [19] | 2015 | ? | ? | + | + | ? | + | + |
Jacobsen et al. [20] | 2012 | + | + | + | + | + | + | + |
Shabestari et al. [21] | 2009 | ? | + | + | + | + | + | + |
Lopez-Cedrum et al. [22] | 2013 | + | + | + | + | + | ? | + |
Goss et al. [23] | 2010 | - | - | + | + | ? | + | + |
Koka et al. [24] | 2010 | + | + | + | + | - | + | + |
Zahid et al. [25] | 2011 | + | + | + | + | + | + | + |
Grant et al. [26] | 2008 | + | + | + | + | - | + | + |
Lazarovici et al. [27] | 2010 | + | + | + | + | + | + | + |
Griffiths et al. [28] | 2012 | + | + | + | + | + | + | + |
Martin et al. [29] | 2010 | + | ? | + | + | ? | + | + |
Bell et al. [30] | 2010 | + | + | + | + | + | + | + |
Fugazzotto et al. [31] | 2007 | + | + | + | + | + | + | + |
Alsaadi et al. [32] | 2007 | ? | + | + | + | ? | + | + |
Turkyilmaz et al. [33] | 2010 | - | - | + | + | + | + | + |
Anner et al. [34] | 2010 | + | + | + | + | ? | ? | + |
Oates et al. [35] | 2009 | - | ? | + | + | ? | + | + |
Dowell et al. [36] | 2007 | - | + | + | + | + | + | + |
Tawil et al. [37] | 2008 | - | - | + | + | + | + | + |
Khandelwal et al. [38] | 2011 | + | + | + | + | + | + | + |
Oliveira et al. [39] | 2011 | - | - | + | + | + | + | + |
Stevenson et al. [40] | 2007 | - | ? | + | + | + | + | + |
Krennmair et al. [41] | 2010 | + | + | + | + | + | + | + |
Welnalder et al. [42] | 2010 | + | + | + | + | + | + | + |
Carr et al. [43] | 2010 | ? | ? | + | + | - | + | + |
Hernandez et al. [44] | 2012 | - | - | + | + | + | + | + |
Lopez-Jornet et al. [45] | 2014 | + | + | + | + | + | + | + |
Czerninski et al. [46] | 2013 | + | ? | + | + | ? | + | + |
Alsaadi et al. [47] | 2008 | ? | ? | + | + | + | + | + |
Montebugnoli et al. [48] | 2012 | - | - | + | + | + | + | + |
Korfage et al. [49] | 2015 | + | + | + | + | + | + | + |
Guckes et al. [50] | 2002 | ? | ? | + | + | ? | + | + |
Alsaadi et al. [51] | 2008 | + | + | + | + | ? | + | + |
Souza et al. [52] | 2013 | + | + | + | + | + | + | + |
Krennmair et al. [53] | 2016 | - | ? | + | + | + | + | + |
Renvert et al. [54] | 2013 | + | + | + | + | + | + | + |
+ = low risk of bias; ? = unclear risk of bias; - = high risk of bias. |