GRADE-CERQual for Qualitative Evidence Synthesis

Standard GRADE was built for quantitative evidence, rating certainty around effect estimates. Qualitative evidence synthesis produces a different kind of output entirely, thematic or conceptual findings rather than pooled effect sizes, and GRADE-CERQual (Confidence in the Evidence from Reviews of Qualitative research) is the adapted framework built specifically for rating confidence in those findings.

The four components of a CERQual assessment

CERQual assesses confidence in each individual review finding, not the review as a whole, across four components.

**Methodological limitations.** This asks whether the primary studies contributing to a given finding had methodological strengths or weaknesses, typically assessed using a tool like the JBI Critical Appraisal Checklist for Qualitative Research or CASP. A finding built primarily on studies with strong reflexivity and clear methodological congruence, the domains covered in JBI's ten-item checklist, supports higher confidence than one built on studies with limited methodological transparency.

**Coherence.** This asks how well the data from the primary studies fit together to support the review finding. A finding supported by consistent, mutually reinforcing data across studies shows high coherence. A finding held together by only a few similar examples, or one where included studies presented conflicting perspectives that weren't well reconciled, shows lower coherence.

**Adequacy of data.** This asks whether there's enough richness and depth of data across the contributing studies to support the finding. A finding backed by thick, detailed data from multiple studies scores higher than one resting on thin data from just one or two sources.

**Relevance.** This asks how directly applicable the contributing studies are to the review's specific question, context, and population. A finding drawn from studies conducted in closely matching contexts and populations scores higher than one drawn from studies in a substantially different setting.

From four components to one confidence rating

After assessing all four components for a given finding, reviewers arrive at an overall confidence rating: high, moderate, low, or very low. Unlike quantitative GRADE, which starts at a baseline and downgrades from there, CERQual assessments typically start from a working assumption of high confidence and are downgraded based on concerns identified in each of the four components, with the overall rating reflecting the most serious concerns found.

Where CERQual fits into your review

**Qualitative evidence synthesis and mixed-methods reviews.** If your review includes a qualitative synthesis component alongside or instead of a quantitative meta-analysis, CERQual is the expected framework for communicating how much confidence readers should place in your thematic findings, the qualitative equivalent of a GRADE Summary of Findings table.

**Presenting alongside your JBI appraisal.** Since methodological limitations, one of CERQual's four components, draws directly on your JBI critical appraisal results, these two processes should be run in a coordinated way rather than as separate, disconnected exercises. Applying JBI in isolation without feeding the results into your CERQual methodological-limitations judgment is a common gap that weakens the overall synthesis.

**Building a Summary of Qualitative Findings table.** Journals increasingly expect qualitative synthesis findings to be presented with their CERQual confidence ratings in a structured table, similar in spirit to a quantitative Summary of Findings table, so readers can see at a glance which findings rest on strong evidence and which are more tentative.

Common mistakes

**Rating the review's overall quality instead of each individual finding.** CERQual assesses confidence finding by finding, not the qualitative synthesis as a single unit. A review can have high confidence in one theme and very low confidence in another, drawn from the same underlying studies.

**Skipping the adequacy and relevance components.** Reviewers new to CERQual sometimes focus heavily on methodological limitations and coherence, since those map more intuitively onto familiar quantitative concepts, while giving adequacy and relevance less rigorous treatment than they deserve.

**[Get a quote](/systematic-reviews#quality-appraisal)** for CERQual and qualitative appraisal support on your review.