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Table 2 Risk of bias in studies

From: A systematic review and meta-analysis of perioperative oral decontamination in patients undergoing major elective surgery

Study Random sequence generation Allocation concealment Blinding Incomplete data outcome addressed
Nicolosi et al. 2014 N/A N/A N/A N/A
Segers et al. 2006 Low risk Low risk Low risk Low risk
Houston et al. 2002 High risk Unclear Unclear Low risk
DeRiso et al. 1996 Low risk Low risk Low risk Low risk
  1. N/A not applicable