Skip to main content

Table 2 Risk bias assessment according to according to the Cochrane collaborations tool

From: Efficacy of platelet-rich fibrin in promoting the healing of extraction sockets: a systematic review

Study

Random sequence generation

Allocation concealment

Blinding of participants and personnel

Blinding of outcome assessment

Incomplete outcome data

Castro et al. [41]

 + 

n.a

−

 + 

 + 

Sharma et al. [54]

 + 

n.a

−

−

 + 

Mourao et al. [56]

 + 

n.a

−

−

 + 

Canellas et al. [47]

 + 

n.a

 + 

 + 

 + 

Ahmed et al. [53]

−

n.a

−

−

 + 

Areewong et al. [55]

 + 

n.a

−

−

 + 

Ustaoglu et al. [42]

 + 

n.a

Participant -

Personnel + 

 + 

 + 

Giudice et al. [40]

 + 

n.a

–

 + 

 + 

Kumar et al. [43]

−

n.a

?

−

 + 

Asmael et al. [58]

−

n.a

−

−

−

Clark et al. [39]

 + 

n.a

?

 + 

 + 

Alzahrani et al. [44]

−

n.a

−

−

 + 

Temmerman al. [50]

 + 

n.a

−

−

 + 

Marenzi et al. [57]

 + 

n.a

?

?

 + 

Suttapreyasri et al. [45]

−

n.a

−

−

 + 

Hauser et al. [46]

?

n.a

−

?

 + 

Thakkar et al. [52]

 + 

n.a

−

−

 + 

Yewale et al. [51]

 + 

n.a

−

 + 

 + 

  1.  + low ristk, −high risk, ? unclear risk, n.a., not applicable