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Table 2 Risk of bias of included studies

From: Words or numbers? Communicating risk of adverse effects in written consumer health information: a systematic review and meta-analysis

Study Random sequence generation Allocation concealment Incomplete outcome data Selective reporting
Berry 2002 Study 1 [10] Unclear Unclear Low Low
Berry 2002 Study 2 [10] Unclear Unclear Low Low
Berry 2003 Study 1 [11] Unclear Unclear Low Low
Berry 2003 Study 2 [11] Unclear Unclear Low Low
Berry 2004 [12] Unclear Unclear Low Low
Berry 2006 [13] Unclear Unclear Unclear Low
Knapp 2004 [14] Unclear High Unclear Low
Knapp 2009a [8] Low Low Unclear Low
Knapp 2009b Study 1 [8] Low Low Unclear Low
Knapp 2009 Study 2 [15] Low Low Unclear Low