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Table 2 Risk of bias assessment for included RCTs

From: Effects of non-surgical periodontal therapy on systemic inflammation and metabolic markers in patients undergoing haemodialysis and/or peritoneal dialysis: a systematic review and meta-analysis

Study

Random sequence generation

Allocation concealment

Blinding of participants and personnel

Blinding of outcome

Incomplete outcome data

Selective reporting

Other biases

Overall risk of bias

Fang 2015

low

low

low

unclear

low

low

low

moderate

Wehmeyer 2014

low

low

low

unclear

low

low

low

moderate

Li 2019

unclear

unclear

unclear

unclear

low

low

low

moderate

Zhang 2017

low

unclear

unclear

unclear

low

low

low

moderate

Ma 2018

unclear

unclear

unclear

unclear

low

low

low

moderate

  1. Low risk of bias: six domains were assessed as “low risk”; Moderate risk of bias: one or more domains were assessed as “unclear”; High risk of bias: one or more domains were assessed as “high risk”