The majority of aspiring researchers cannot distinguish between a literature review and a systematic review. You must already be aware, as a PhD candidate or early career researcher, that the literature review is the most crucial component of every scientific investigation, without which no study can be started. Literature reviews, however, are an "umbrella term" in and of themselves. Depending on their particular relevance to each study, you may need to conduct a variety of reviews, including systematic literature reviews, throughout your academic publication journey.
Well, if you are a beginner or university student, then you must be learning these terms, but if you have no idea, then no worries, because you are in the right place to learn this. Professionals have crafted this comprehensive article that differentiates these terms for your understanding.
Additionally, if you are looking for some assistance with your academic concepts in any subject, then we recommend getting expert guidance. Our experts can help you conduct a systematic review of your research. So, read further, have some in-depth understanding of these concepts, and conduct extensive research for your project. Now let’s delve into the details in our next section.
Understand Literature and Systematic Review
Literature Review
We need to define a few concepts first. The term "literature review" refers to a comprehensive overview of the existing data on a specific subject. Literature reviews can employ a range of techniques to locate, evaluate, and present data, and they can be extremely basic or extremely complicated.
This kind of review, sometimes referred to as a traditional (narrative) review, seeks to offer a theoretical or contextual knowledge of the topic. Think of it as a first step that establishes the foundation for further investigation.
A literature review can be a standalone paper or a component of a longer research paper. To provide background for the study conducted, almost all papers and theses based on observational or experimental research start with a literature review, no matter how long or short. When published as a stand-alone article, a literature review serves only to provide a comprehensive overview of the corpus of prior research on a topic.
Systematic Review
A "systematic review" is a particular kind of review that aims to compile all of the available evidence with little to no bias by using transparent and rigorous processes. A competent systematic review adheres to global norms found in the 27-item Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist. Less thorough assessments are frequently referred to as "narrative", "comprehensive", or just "literature reviews". This typically occurs in five stages:
- Creating the query: You must formulate a specific and solvable question at this fundamental step.
- Literature Searching: Here, you must develop a clear search strategy that guarantees the inclusion and repeatability of ALL qualified studies while ensuring that all potentially pertinent studies are found.
- Verifying Quality: Examine each of the qualified studies you have found in detail in this stage, paying particular attention to whether or not they satisfy precise inclusion and exclusion requirements. Evaluating a study's scientific quality entails determining how well the study design is conducted, how robust it is, and how well the possibility of bias of any kind is recognised and taken into consideration.
- Recapitulating the Proof: This entails compiling and presenting the results of several investigations, understandably and coherently. The data are extracted (using preset tools or programs) if the review contains a meta-analysis.
- Analysing the Results: At this point, you can finally make sense of everything by concluding.
5 Basic Differences Between Literature Review and Systematic Review
1. The Review's Objective
A literature review can aim to address a specific topic, such as "What is the efficacy of CPAP for people with sleep apnea?" or it can be general and descriptive, such as "Describe the available treatments for sleep apnea."
On the other hand, a systematic review's objective is to provide a precise and targeted response to a certain topic, such as "Which treatment for sleep apnoea reduces the apnea-hypopnea index more: CPAP or mandibular advancement device?" Because systematic reviews are thorough and have a lower chance of bias, people who want to make evidence-based judgements turn to them.
2. Looking For Proof
A crucial distinction is where and how evidence is sought. Systematic reviews necessitate more thorough attempts to find evidence, whereas literature reviews simply require one database or source. A variety of databases are searched, each using a unique search approach that is often created and carried out by a librarian with specialised knowledge.
Furthermore, systematic reviews frequently involve efforts to locate data outside of standard databases. To find more unpublished data, systematic reviewers may contact study authors or examine conference abstracts. Professional association websites or pharmaceutical corporations' websites. These additional measures are all an effort to reduce bias in the evidence summary.
3. Evaluating Search Results
The inclusion criteria for a systematic review are set at the beginning of the project and are applied uniformly to search results. These metrics are typically presented as PICOs (population, intervention, comparison, and outcomes). Reviewers use stringent PICO-based criteria to assess whether search results are suitable for inclusion.
Dual independent assessment of search results, in which at least two people separately evaluate each search result, is another essential element of a systematic review. There is only one reviewer in a lot of other literature reviews. This may lead to missed research and bias, even if it is inadvertent.
4. An Overview of The Results
When doing a systematic review, the risk of bias assessment is often used to assess the quality of the evidence at the study level and often across studies. It is rare for other literature reviews to examine and report on formal quality assessments conducted by individual researchers.
A thorough presentation of the facts necessitates a risk of biased evaluation because, at worst, judgments derived from biased data can be dangerous and incorrect. Numerical estimates of treatment effects can occasionally be produced by quantitatively combining the findings of a systematic review (for instance, in a meta-analysis).
5. Results' Usefulness
It should come as no surprise that the results of a systematic review are often of higher quality and have a reduced risk of bias than those from other kinds of literature reviews because of the rigour and transparency that are applied to this process. Literature reviews can help provide the reader with an overview of a topic and inform background portions of papers and reports.
Governmental organisations and professional groups rarely base such significant actions on non-systematic reviews; instead, they employ systematic studies to provide guidelines and recommendations. To make evidence-based decisions on patient treatment, clinicians can also rely on high-quality systematic reviews.
Wrapping It Up
There is a place for every kind of review in the scientific literature. For a few targeted research issues, a systematic review can provide a thorough summary and assessment of all the pertinent evidence. To gather the best available evidence for broader research concerns, other types of literature reviews can employ targeted search strategies. The approach to be employed ultimately depends on the research issue and the goal of the review.
So, this is about all the differences between systematic review and literature review. Additionally, if you need more assistance with any other concepts, you can get help from experts by getting our online assignment help service. Here, experts will help you gain an in-depth understanding of every concept and provide you with tailored solutions for your queries. So, get ready to excel in your research process and craft a great paper and shine academically.
