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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

Bakker

-(2003) [66]

-Cluster RCT, cross-sectional design (post-test only).

Low

Unclear

Unclear

Uncleara

Lowa

Unclear

High

Chan

-(2013) [67]

-Quasi-experimental design

High

High

High

Low

High

Low

High

Kaner

-(2003) [68]

-Cluster RCT

Low

Low

Low

High

Low

Unclear

High

Katz

-(2004) [69]

-RCT

Low

Unclear

Unclear

Unclear

Low

Unclear

High

Lennox

-(1998) [72]

-RCT

Low

Unclear

Low

Low

Low

High

High

Moher

-(2001) [70]

-Cluster RCT

Low

Low

High

High

Low

Unclear

High

Secker-Walker,

-(2000) [71]

-Non-RCT

Unclear

Unclear

Unclear

Unclear

High

High

High

  1. aSame risk of bias judgement for both classes of outcomes (clinician reported and client reported)