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Table 2 Methodological quality of trials included in meta-analysis

From: The role of remote ischemic preconditioning on postoperative kidney injury in patients undergoing cardiac and vascular interventions: a meta-analysis

  Year Randomization method Blind Explanation for withdrawals/drop outs Jadad score Allocation concealment Intention-to-treat analysis
Ali et al. [16] 2007 Computer-generated random numbers Single blind Yes 3 Sealed envelopes Yes
Hoole et al. [17] 2009 Computer-generated random numbers Single blind Yes 3 Sealed envelopes No
Walsh et al. [18] 2009 Computer-generated random numbers Unclear Yes 3 Sealed envelopes Yes
Walsh et al. [19] 2010 Computer-generated random numbers Unclear Yes 3 Sealed envelopes Yes
Rahman et al. [20] 2010 Computer-generated random numbers Double blind Yes 5 Sealed envelopes Yes
Choi et al. [21] 2010 Computer-generated randomization table Unclear Yes 3 Unclear Yes
Thielmann et al. [22] 2010 Unclear Single blind Yes 2 Unclear Yes
Zimmerman et al. [23] 2011 A block randomization generated by the study coordinator Single blind Yes 2 Sealed envelopes Yes
Lucchinette et al. [24] 2012 Computer-generated random numbers Unclear Yes 3 Sealed envelopes Yes
Young et al. [25] 2012 A block randomization using online randomization sequence generator Double blind Yes 5 Sealed envelopes Yes