Conducting a literature review in the context of research and development is far from a mere academic requirement. It is a strategic skill, a foundation of scientific legitimacy, and often the cornerstone of a high-impact publication. Yet many researchers still underestimate its importance or perform it mechanically without real added value.
What is a literature review?
A literature review, also known as a state-of-the-art scientific review, is an in-depth analysis of existing publications on a specific topic. It involves collecting, analyzing, and organizing multiple articles or scientific sources to provide a comprehensive overview of the current knowledge on a subject.
The goals of a literature review include:
- identifying what has already been studied and what remains unexplored
- detecting scientific controversies or established consensus
- defining the scope and direction of new research
- justifying the relevance of a clinical trial or protocol
Why it matters in a regulatory context
With the enforcement of Regulation (EU) No. 536/2014 on clinical trials, scientific transparency and methodological robustness have become legal requirements. A properly structured literature review helps establish a solid scientific rationale, which is crucial for documents such as marketing authorization applications (MAA), CTIS submissions, or evaluations by regulatory bodies like the French HAS.
How to conduct an effective literature review
The process starts with clearly defining your objective and being as specific as possible about your research question to save time and resources.
1. formulate a clear question using the PICO framework
The first step is to articulate the problem the review aims to address. Using the PICO model—Population, Intervention, Comparison, Outcome—helps guide a focused literature search.
Reference: Centre for Evidence-Based Medicine
2. conduct a comprehensive search for publications
Scientific articles that address the question must be identified from reputable databases and platforms, such as:
- PubMed/MEDLINE
- Cochrane Library
- Embase
- ClinicalTrials.gov for ongoing trials
- Google Scholar (broad but less filtered—use with caution)
After gathering the sources, apply inclusion and exclusion criteria to narrow down the most relevant results. Make sure to use precise search terms and Boolean syntax to improve search efficiency.
Example: (cancer OR neoplasm) AND (immunotherapy OR checkpoint inhibitor) AND (randomized controlled trial)
3. extract, filter, and analyze the data
This step requires critically reviewing the selected studies for quality and relevance. Evaluate methodological soundness and avoid bias. Data must be reliable and evidence based.
Store key abstracts and data tables in a structured spreadsheet. For systematic reviews, follow the PRISMA diagram workflow.
The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) diagram is essential for documenting the selection process of studies in a transparent and reproducible manner. It supports scientific credibility and is widely used in leading journals such as The Lancet and BMJ.
Official PRISMA guidelines (2020 update): https://prisma-statement.org
4. write in a concise, critical, and coherent style
The objective is not to simply compile summaries. The narrative should synthesize findings in a readable and logical structure, placing results in their proper scientific and contextual perspective.
Common mistakes to avoid
- relying exclusively on Google Scholar or PubMed
- using outdated sources (more than two years old in fields like oncology)
- omitting negative or controversial results
- ignoring preprints and real-world data
Conclusion
A literature review is not an isolated academic task. It is a powerful strategic tool that shapes research direction, enhances legitimacy, and increases visibility in both scientific and regulatory arenas.
At BluePharm, we emphasize the value of a well-executed review to:
- frame clinical projects from the earliest stages
- convince ethics committees and regulatory authorities
- strengthen the scientific rationale of submissions to CTIS
- and identify high-impact publication opportunities
By mastering this foundational skill, researchers and sponsors can gain a critical edge in today’s complex and competitive R&D landscape.
