How to Choose a Narrative Review Topic

A good narrative review topic is focused enough to cover in a single article, relevant to a defined audience, supported by enough literature to synthesise, and not already covered well by a recent review. Choose it by testing the scope, audience and novelty before you commit.

Criteria

• Scope: Can you define the topic in one sentence, with limits (population, setting, time)?
• Audience: Who needs this and why now?
• Literature: Are there enough studies, but not hundreds you cannot read?
• Novelty: What would the review add to existing reviews (a new angle, updated evidence, a clinical perspective)?
• Expertise and supervision: Do you or your mentor know the area?
• Journal fit: Is there a journal that publishes this type of review?

Quick test

1. Run a PubMed search for recent reviews on the topic.
2. Read the last two review abstracts and note what they cover.
3. Count the primary studies in the last five years.
4. Write a one-sentence aim and ask a mentor whether it is worthwhile.

Illustrative example

Invented for teaching. A student considers "AI in medicine", which is far too broad. She narrows to "Machine-learning tools for diabetic retinopathy screening in primary care: what clinicians need to know". A search finds several reviews on algorithm accuracy but few on implementation in primary care, so her angle adds value.

Getting feedback early

Present your one-sentence aim and your two-line novelty statement to a mentor or a clinician who might read the article. Ask what they would want the review to answer and which published reviews they already use. Feedback at this stage costs little and often shows that a topic is either more useful or less novel than it seemed.

Common pitfalls

• Choosing a topic that is already well covered.
• Choosing something so new that few studies exist.
• Choosing something so broad that you cannot finish.

Key takeaways

• Scope, audience, literature and novelty decide the topic.
• Test with a quick search before committing.

This page is general educational information about research methods. It is not medical, legal or regulatory advice; follow your institution's ethics board and your target journal's instructions.