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Table 2 Risk of bias for included studies

From: Systematic review of the health and societal effects of medication organisation devices

   Items from Cochrane risk of bias tool
Study Study design Randomisation procedure Concealment of allocation Blinding of assessors Blinding of treatment providers Attrition addressed All outcomes reported Other risks of bias
Becker [20] RCT ? ? ? x ? ? x
Carruthers [32] Audit NA NA NA NA NA ?
Crome [27] RCT ? ? ? ? ?
Feetam [21] Prospective NA NA NA NA NA ?
Huang [23] RCT ? ? ? ?
Levings [33] Audit NA NA NA NA NA ? x
MacIntosh [28] RCT ? ? ? ?
McElnay [19] Cross-section NA NA NA NA NA x x
Petersen [24] Prospective ? ? ? ? ?
Rehder [25] RCT ? ? ? ? ? ?
Roberts [18] Cross-section, audit NA NA NA NA NA ? x
Ryan-Woolley [29] RCT ? ? ? ? ?
Simmons [26] RCT ? ? x ?
Skaer [31] RCT ? ? ? ? ? ?
Skaer [30] RCT ? ? ? ? ? ?
Stewart [34] Cross-section NA NA NA NA NA ?
Wong [22] RCT ? ? ? ? x ? x
  1. reported/low risk of bias, x not reported/high risk of bias, NA not applicable, ? unclear