A narrative review develops an interpretation of a topic. A systematic review uses explicit, planned methods to identify, assess, and synthesize studies addressing a question. Choose by the answer your readers need, not by a promise that one approach is quick and the other automatically rigorous.

One clinical topic, three different questions

Fictional planning example: a research team is interested in follow-up after hospital discharge for adults with heart failure. The questions below illustrate review purposes. They do not report findings or recommend a treatment.

To explain a clinical topic: narrative review

“How are post-discharge follow-up programmes described, and which explanations are offered for differences between settings?”

A narrative review could connect concepts, describe competing explanations, and identify unresolved issues. Explain the review's purpose, how literature was sought, and how sources support the interpretation. SANRA is one appraisal aid for narrative reviews; it is not a reporting guideline or a guarantee of quality.

To assess an intervention: systematic review

“In adults with heart failure discharged home, how does nurse-led telephone follow-up, compared with usual follow-up, affect unplanned readmissions within 30 days?”

This calls for a defined comparison, eligibility criteria, a planned search and selection process, and assessment of the included evidence. The population, setting, intervention and follow-up period need to be specified rather than left for a tool to infer. Cochrane's question-formulation guidance connects the review question to these decisions. A systematic approach reduces opportunities for selective decisions; it does not guarantee a certain answer.

To map what has been studied: scoping review

“Which types of post-discharge support have been studied, in which settings, and using which outcomes?”

A scoping review can map the range and characteristics of evidence. It still needs explicit methods. Critical appraisal is not mandatory in JBI scoping-review methodology, but may be included for a stated purpose. A map of studies alone is not an estimate of treatment benefit. See the JBI scoping-review manual and its appraisal guidance.

What is the difference between a narrative and systematic review?

A narrative review can be focused and carefully documented. A systematic review can address a broad question. The distinction is not simply broad versus narrow, or days versus months. It is how the question, selection, appraisal and synthesis are planned and reported.

Decision	Narrative review	Systematic review
Purpose	Develop a reasoned account of a topic	Address a question using explicit review methods
Source selection	Explain the search and selection approach, including its limits	Predefine eligibility and a search and selection process
Interpretation	Connect sources and discuss conflicting accounts	Assess included evidence and uncertainty using appropriate methods
Reader's check	Can the interpretation be traced to its sources?	Can the methods, decisions and conclusions be inspected?

Neither label establishes quality by itself. The usefulness of the answer depends on the evidence and the work done to interpret it.

PRISMA describes reporting, not a quality certificate

PRISMA 2020 helps authors report systematic reviews transparently. It is not a manual for conducting a review and should not be used to assess methodological quality. A flow diagram or software export does not establish compliance on its own.

Plan the methods before making review decisions, make the protocol available as appropriate, and explain subsequent changes. Do not treat a registration record as proof that the methods were sound or followed.

Where does meta-analysis fit?

Meta-analysis is statistical combination of results, not another step on a ladder of review quality. A systematic review can be useful without a pooled estimate. Whether to combine results depends on the question and whether the studies and data can support a meaningful analysis; a forest plot alone does not settle that decision. See Cochrane's meta-analysis chapter.

Write the decision before choosing the tool

For the fictional heart-failure team, the next step is to agree whether readers need an explanation, an evidence map, or an assessment of an intervention. Then specify the population and setting, the intended output, and the expertise and resources the work requires. A narrative review is not a compulsory first stage before every systematic review.

Use the PICO question builder to draft an intervention question, or the academic search guide to think through source coverage. Review any generated structure before using it in a protocol.

Where INRA fits

INRA has separate narrative-review and systematic-review workflows. Inspect the relevant product demonstration and decide whether the workflow suits your planned methods. AI assistance does not establish source completeness, scientific validity or the correctness of a clinical conclusion.

About the author

Marwan Taman is the founder and CEO of INRA.AI, where he builds AI systems for literature review and evidence synthesis. A software engineer by background, he is a co-author of an LLM-assisted health-literacy study presented at the American Stroke Association's International Stroke Conference 2026 and published in Stroke. He writes about AI, research workflows, and evidence synthesis. Connect on LinkedIn.

Narrative Review vs. Systematic Review: How to Choose the Right Method