A ‘Risk of bias’ table is an optional, although strongly recommended, extension of the ‘Characteristics of included studies’ table. The standard ‘Risk of bias’ table includes assessments for sequence generation, allocation sequence concealment, blinding, incomplete outcome data, selective outcome reporting and ‘other issues’. For each item, the table provides a description of what was reported to have happened in the study and a subjective judgement regarding protection from bias (‘Yes’ for a low risk of bias, ‘No’ for a high risk of bias; ‘Unclear’ otherwise).
See also