IMRaD Format Explained

IMRaD stands for Introduction, Methods, Results and Discussion, the standard structure of original research articles in medicine. Each section answers a different question, which lets readers find what they need and judge the study.

What each section answers

The abstract summarises all four, and the title identifies the topic and design.

Why it works

IMRaD mirrors the research process and keeps description (Methods and Results) separate from interpretation (Discussion). It lets readers check the Methods and Results before deciding whether they agree with the Discussion.

Variations

Journals may add sections (for example a structured abstract, key points, plain-language summary, limitations subsection or declarations) or use "Patients and Methods". Case reports, reviews and qualitative studies use different structures; see their own guidelines.

Illustrative example

Invented for teaching. A paper's Results contain the sentence "This suggests that exercise causes weight loss", which belongs in the Discussion. The author moves it, and in the Results simply states the difference in weight with its confidence interval.

Using it as a checklist

Check that each Introduction paragraph moves toward the objective; that the Methods contain every detail needed to repeat the study; that the Results answer every objective; and that the Discussion does not introduce new results.

Common pitfalls

• Methods in the Results section, results in the Discussion.
• A Discussion that does not mention limitations.

Key takeaways

• IMRaD separates what was done, what was found and what it means.
• Keep each part in its place.

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.