Academic Writing

How to Write a Literature Review for a Medical Thesis

Move from a pile of papers to an evidence-based narrative relevant to your thesis.

Begin with a focused question

A literature review is more than a list of study abstracts. It should explain how prior evidence relates to the research question, where findings agree or conflict, and why the proposed work matters. Define the population, condition, intervention or exposure, comparison and outcomes before searching.

Practical workflow

Convert the research question into search concepts and synonyms.
Search relevant databases such as PubMed and other sources appropriate to the discipline.
Record the search date, database, query and any filters used.
Screen titles and abstracts against explicit inclusion criteria.
Read important full-text studies and extract design, sample, outcome definitions, estimates and limitations.
Organize findings by theme, method or chronology depending on the question.
Verify every bibliographic record before adding it to the thesis.

A useful comparison matrix

Source	Design and participants	Key measure	What it contributes	Limitation
Study A	Record after reading article	Record verified measure	Relevance to your objective	Evidence quality concern

The matrix above is a template, not a real published study.

Synthesis versus summary

Instead of writing one disconnected paragraph per author, group studies addressing the same outcome. Explain why estimates may differ: setting, selection criteria, sample size, data collection method, case definitions, or analytic adjustment. Avoid making causal claims that the underlying study designs do not support.

For systematic reviews, follow a prespecified review protocol and an appropriate reporting guideline; ordinary narrative reviews and systematic reviews are not interchangeable.

ResearchTry Literature Search provides a multi-source discovery workspace; primary sources must still be read and checked.

Frequently asked questions

Is a narrative review the same as a systematic review?

No. A systematic review requires prespecified eligibility and transparent, reproducible search and selection methods; PRISMA helps report it.

Can AI-generated citations be used as references?

Not without verification. Check the original source and bibliographic details before citing.