Bias and evidence certainty

Assess limitations and confidence

A review without pooling still needs transparent appraisal and interpretation. Choose a certainty approach appropriate to the review question; do not invent a pooled effect or numerical certainty score.

Flow diagram

Steps

Choose appraisal approach

Select design-appropriate methods and outcome-specific judgments.

Study bias assessment

Assess each contributing result with independent judgments and evidence.

Resolve disagreements

Record adjudication before interpretation.

Assess missing evidence

Consider unavailable studies, outcomes and selective reporting.

Assess evidence certainty

Evaluate limitations, consistency, directness, precision and reporting concerns per outcome.

Qualify conclusions

Link limitations to structured synthesis without computing unsupported pooled estimates.