Medical literature is divided into several established formats, each with its own function. An original article presents new research data, a case report describes a rare observation, a review summarises published sources, and a meta-analysis statistically combines the results of several studies. Understanding these differences helps you choose the right format for your own work and the journal's requirements.
What is an original research article?
An original article is a basic and widely used format for medical publication. The researcher presents their own data, obtained through clinical, laboratory or population-based research, and describes the methodology used to obtain it. Medical journals indexed in Scopus and Web of Science usually require the IMRAD structure (Introduction, Methods, Results and Discussion), which ensures a logical presentation.
A typical original article contains the following sections:
- introduction setting out the rationale and aim of the study
- materials and methods, including the study design and statistical analysis
- results, presented with tables and figures
- discussion of the findings in the context of existing literature
- a reference list and author details
This format suits researchers with their own primary data: results from trials, tests or patient observations.
Case reports as a separate type of medical publication
A case report describes the observation of one or more patients: a rare presentation of a disease, an atypical response to treatment, or an unexpected diagnostic path. Unlike an original article, this format does not require a large sample, but it does impose strict requirements on the completeness of the description.
A useful reference point when preparing such a publication is the CARE (CAse REport) guidelines, which comprise thirteen items, from the title through to the timeline of observation, diagnosis, treatment and follow-up. A case report often becomes the first step in describing a new disease, and is frequently used as teaching material for trainee doctors.
How does a literature review differ from original research?
A literature review generally does not contain new data: the researcher analyses already published work on the topic and summarises the accumulated evidence. A distinction is made between a narrative review, based on a subjective selection of sources, and a systematic review, which is conducted according to a pre-registered protocol with clearly defined search and selection criteria.
Systematic reviews are most often prepared according to PRISMA 2020 (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) – a twenty-seven-item reporting checklist. In Kazakhstan, a review published in an indexed journal is often accepted as a qualifying publication for a doctoral defence on an equal footing with an original article.
What is a meta-analysis for?
A meta-analysis statistically combines the quantitative results of several studies, usually randomised controlled trials, addressing the same question. Unlike a review, a meta-analysis calculates a pooled effect and assesses the heterogeneity of the included studies.
Within the evidence hierarchy, a meta-analysis traditionally occupies the top position: it combines data from a larger number of patients and reduces the influence of chance in any single study. Preparing a meta-analysis generally involves registering a protocol and having a command of the statistical methods used to pool effects, which is why researchers with experience of systematic reviews more often choose this format.
How do you choose the type of medical publication for your research?
The choice of publication type depends on several factors:
- Whether you have your own primary research data.
- The clinical significance and rarity of the case being described.
- The volume and quality of literature already published on the topic.
- The requirements of the journal, your academic supervisor or the dissertation committee.
- The aim of the publication – building a portfolio, meeting a doctoral requirement, or contributing to clinical practice.
Early-career researchers generally find it easier to start with a case report or a review; a meta-analysis more often comes at a later stage of one's academic career.
Each of the four formats occupies its own place in the structure of medical literature, from presenting new data to synthesising accumulated knowledge. Choosing the right format at the outset saves the author time and improves the chances of a successful review process at the chosen journal.
Preparing a medical publication? The specialists at Scientific Publications can help you choose the right format and journal for your work, and prepare your manuscript in line with the requirements of international databases. To receive a free consultation, fill in the form below and our manager will be in touch with you shortly. Here's to new academic achievements!
