Table 3 Risk of bias assessment
From: Efficiency of occlusal splint therapy on orofacial muscle pain reduction: a systematic review
| Â | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
|---|---|---|---|---|---|---|---|
Ficnar, 2013 [21] | ? | ? |  −  | ? |  +  |  +  |  +  |
Costa, 2021 [13] |  +  | ? |  −  |  +  |  +  |  +  |  +  |
Conti, 2012 [22] | ? | ? |  −  |  +  |  −  |  −  |  +  |
Grillo, 2015 [23] | ? | ? |  −  |  −  | ? |  +  |  −  |
Giannakopoulos, 2018 [25] | ? | ? |  −  | ? |  +  |  +  |  +  |
Manfredini, 2018 [26] |  +  | ? |  −  |  +  |  +  |  +  |  +  |
Keskinruzgar, 2019 [27] | ? | ? |  −  | ? | ? |  +  |  +  |
Erbasar, 2017 [28] | ? | ? |  −  |  −  | ? |  +  |  −  |
Oz, 2010 [24] | ? | ? |  −  |  +  |  +  |  +  |  +  |
Vicente-Barrero, 2012 [29] | ? | ? |  −  | ? | ? |  +  |  −  |
de Felicio, 2010 [30] |  +  | ? |  −  | ? | ? |  +  |  +  |
Grootel R, 2017 [31] |  +  | ? |  −  |  +  |  +  |  +  |  +  |
Michelotti. 2012 [32] |  +  | ? |  −  |  +  |  +  |  +  |  +  |