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Table 1 Risk of bias of trials included in the present studya

From: Effect of standardized training on the reliability of the Cochrane risk of bias assessment tool: a prospective study

Source of bias Low risk Unclear risk High risk
Random sequence generation 29 (52) 27 (48) 0 (0)
Allocation concealment 13 (23) 42 (75) 1 (2)
Blinding of patients 16 (29) 7 (13) 33 (59)
Blinding of therapists 4 (7) 1 (2) 51 (91)
Blinding of outcome assessors 22 (39) 12 (21) 22 (39)
Incomplete outcome data 17 (30) 13 (23) 26 (46)
  1. Displayed values are number of trials and percentage
  2. aFrom consensus between a pair of experienced raters