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Table 4 Bias risks in the included RCTs

From: Herbal medicines for treating tic disorders: a systematic review of randomised controlled trials

Study Random sequence generation Allocation concealment Blinding of participants Incomplete outcome data Selective outcome reporting Other bias
Wu et al. (2009) [14] L U H U U U
Wu et al. (2010) [15] U U H U U U
Zhao et al. (2010) [16] L U H U U U
Li et al. (2009) [17] U U L U U U
  1. L low risk of bias; U unclear risk of bias; H high risk of bias.