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Table 2 Risk of bias within trials

From: Bovine colostrum supplementation and upper respiratory symptoms during exercise training: a systematic review and meta-analysis of randomised controlled trials

Study or subgroup Random sequence generation Allocation concealment Blinding: participants and personnel Incomplete outcome data Overall risk
Crooks 2006 [16] unclear unclear unclear adequate high
Crooks 2010 [17] unclear unclear unclear adequate high
Jones 2014 [14] unclear unclear unclear adequate high
Shing 2007 [18] adequate adequate adequate adequate low
Shing 2013 [19] adequate adequate adequate unclear moderate