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Table 3 Summary of risk of bias in individual trials

From: Systematic review of interventions to increase the delivery of preventive care by primary care nurses and allied health clinicians

Intervention trial author, year, and trial design Random sequence generation (selection bias) Allocation concealment (selection bias) Blinding of participants and personnel (performance bias) Blinding of outcome assessment (detection bias) Incomplete outcome data (attrition bias) Selective reporting (reporting bias) Other potential sources of bias
-(2003) [66]
-Cluster RCT, cross-sectional design (post-test only).
Low Unclear Unclear Uncleara Lowa Unclear High
-(2013) [67]
-Quasi-experimental design
High High High Low High Low High
-(2003) [68]
-Cluster RCT
Low Low Low High Low Unclear High
-(2004) [69]
Low Unclear Unclear Unclear Low Unclear High
-(1998) [72]
Low Unclear Low Low Low High High
-(2001) [70]
-Cluster RCT
Low Low High High Low Unclear High
-(2000) [71]
Unclear Unclear Unclear Unclear High High High
  1. aSame risk of bias judgement for both classes of outcomes (clinician reported and client reported)