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Table 6 Risk of bias summary - Details of RCTs included in the study and assessment of the risk of bias of each study according to Cochrane

From: What is the effectiveness of the support worker role for people with dementia and their carers? A systematic review

  Random sequence generation (selection bias) Allocation concealment (selection bias) Blinding participants and personnel (performance bias) Blinding of outcome assessment (detection bias) (patient-reported outcomes) Incomplete outcome data (attrition bias) (short-term 2–6 weeks) Incomplete outcome data (attrition bias) (long-term >6 weeks) Selective reporting (reporting bias)
Case Managers – Randomised Controlled Trials (Cochrane Risk of Bias Tool)
 Chien and Lee 2008 [23]
 Hong Kong
 Not registered
? ? + + + + ?
 Chien and Lee 2011 [24]
 Hong Kong
 Not registered
+ + + + + + ?
 Jansen et al., 2011 [25]
 The Netherlands
 ISRCTN83135728
+ + + + + + -
 Lam et al., 2010 [26]
 Hong Kong
 Not registered
+ + + + + + -
Care Managers – Randomised Controlled Trials (Cochrane Risk of Bias Tool)
 Callahan et al., 2006 [47]
 USA
 NCT00246896
+ + + + + + +
 Chodosh et al., 2012 [44]
 USA
 ISRCTN72577751
+ + ? ? + + +
 Duru et al., 2009 [45]
 USA
 ISRCTN72577751
+ + ? ? + + +
 Specht et al., 2009 [48]
 USA
 Not registered
+ ? - - - - ?
 Vickrey et al., 2006 [46]
 USA
 ISRCTN72577751
+ + + + + + +
Counselling support roles – Randomised Controlled Trials (Cochrane Risk of Bias Tool)
 Bass et al., 2003 [33]
 USA
 Not registered
+ ? + ? ? ? ?
 Brodaty et al., 2009 [38]
 UK & USA
 Not registered
+ ? ? + + + ?
 Burns et al., 2003 [35]
 USA
 NCT00178165
+ ? ? + ? ? +
 Clark et al., 2004 [34]
 USA
 Not registered
+ ? + ? ? - ?
 Eisdorfer et al., 2003 [36]
 USA
 NCT00178165
+ ? ? ? ? ? +
 Fortinsky et al., 2008 [43]
 USA
 Not registered
+ + ? + + + ?
 Gaugler et al., 2008 [30]
 USA
 NCT00362284
+ ? ? ? + + +
 He’bert et al., 2003 [39]
 Canada
 Not registered
+ ? ? + + + ?
 Mahoney et al., 2003 [37]
 USA
 NCT00178165
+ ? ? + + + +
 Mittelman et al., 2004 [31]
 USA
NCT00362284
+ ? - - + + +
 Mittelman et al., 2006 [32]
 USA
 NCT00362284
+ + - ? + + +
 Nobili et al., 2004 [40]
 Italy
 Not registered
+ ? ? ? + + ?
 Teri et al., 2003 [41]
 USA
 Not registered
+ + ? + + + ?
 Wray et al., 2010 [42]
 USA
+ ? ? + ? ? -
Team based/Multi-Agency/Integrated Support Roles – Randomised Controlled Trials (Cochrane Risk of Bias Tool)
 Eloniemi-Sulkava et al., 2009 [49]
 Finland
 Not registered
+ + ? - - - ?
Support/Key worker roles – Observational Study Design Analytic Cohort Studies (adapted from the CASP)
 Woods et al., 2003 [52]
 United Kingdom
 Not Registered
+ + ? - + - ?
Team Based/Multi-Agency/Integrated Support Roles – Observational Study Design Descriptive Case Report/Case Series (CASP)
 Stevenson et al., 2006 [50]
 United Kingdom
 Not Registered
? - ? - - - ?
  1. - High risk of bias + Low risk of bias ? Unclear risk of bias