The effect of chronic caffeine supplementation on endurance performance has been studied extensively in different populations. However, concurrent research on the effects of acute supplementation of caffeine on cardiorespiratory responses during endurance exercise in hot and humid conditions is unavailable
Source: Ping, WC, Keong, CC & Bandyopadhyay, A 2010, ‘Effects of acute supplementation of caffeine on cardiorespiratory responses during endurance running in a hot and humid climate’, Indian Journal of Medical Research, vol. 132, pp. 36–41. Used under a CC-BY-NC-SA licence.
Step two of writing a literature review is synthesis.
Synthesis describes combining separate components or elements to form a connected whole.
You will use the results of your analysis to find themes to build your literature review around. Each of the themes identified will become a subheading within the body of your literature review.
A good place to start when identifying themes is with the dependent variables (results/findings) that were investigated in the research studies.
Because all of the research articles you are incorporating into your literature review are related to your topic, it is likely that they have similar study designs and have measured similar dependent variables. Review the ‘Results’ column of your analysis grid. You may like to collate the common themes in a synthesis grid (see, for example Table 7.4 ).
Step three of writing a literature review is evaluation, which can only be done after carefully analysing your research papers and synthesising the common themes (findings).
During the evaluation stage, you are making judgements on the themes presented in the research articles that you have read. This includes providing physiological explanations for the findings. It may be useful to refer to the discussion section of published original investigation research papers, or another literature review, where the authors may mention tested or hypothetical physiological mechanisms that may explain their findings.
When the findings of the investigations related to a particular theme are inconsistent (e.g., one study shows that caffeine effects performance and another study shows that caffeine had no effect on performance) you should attempt to provide explanations of why the results differ, including physiological explanations. A good place to start is by comparing the methodologies to determine if there are any differences that may explain the differences in the findings (see the ‘Experimental design’ column of your analysis grid). An example of evaluation is shown in the examples that follow in this section, under ‘Running performance’ and ‘RPE ratings’.
When the findings of the papers related to a particular theme are consistent (e.g., caffeine had no effect on oxygen uptake in both studies) an evaluation should include an explanation of why the results are similar. Once again, include physiological explanations. It is still a good idea to compare methodologies as a background to the evaluation. An example of evaluation is shown in the following under ‘Oxygen consumption’.
Once you have completed the analysis, and synthesis grids and written your evaluation of the research papers , you can combine synthesis and evaluation information to create a paragraph for a literature review ( Figure 7.4 ).
The following paragraphs are an example of combining the outcome of the synthesis and evaluation stages to produce a paragraph for a literature review.
Note that this is an example using only two papers – most literature reviews would be presenting information on many more papers than this ( (e.g., 106 papers in the review article by Bain and colleagues discussed later in this chapter). However, the same principle applies regardless of the number of papers reviewed.
The next part of this chapter looks at the each section of a literature review and explains how to write them by referring to a review article that was published in Frontiers in Physiology and shown in Figure 7.1. Each section from the published article is annotated to highlight important features of the format of the review article, and identifies the synthesis and evaluation information.
In the examination of each review article section we will point out examples of how the authors have presented certain information and where they display application of important cognitive processes; we will use the colour code shown below:
This should be one paragraph that accurately reflects the contents of the review article.
The introduction should establish the context and importance of the review
The reference section provides a list of the references that you cited in the body of your review article. The format will depend on the journal of publication as each journal has their own specific referencing format.
It is important to accurately cite references in research papers to acknowledge your sources and ensure credit is appropriately given to authors of work you have referred to. An accurate and comprehensive reference list also shows your readers that you are well-read in your topic area and are aware of the key papers that provide the context to your research.
It is important to keep track of your resources and to reference them consistently in the format required by the publication in which your work will appear. Most scientists will use reference management software to store details of all of the journal articles (and other sources) they use while writing their review article. This software also automates the process of adding in-text references and creating a reference list. In the review article by Bain et al. (2014) used as an example in this chapter, the reference list contains 106 items, so you can imagine how much help referencing software would be. Chapter 5 shows you how to use EndNote, one example of reference management software.
Click the drop down below to review the terms learned from this chapter.
Copyright note:
Bain, A.R., Morrison, S.A., & Ainslie, P.N. (2014). Cerebral oxygenation and hyperthermia. Frontiers in Physiology, 5 , 92.
Pautasso, M. (2013). Ten simple rules for writing a literature review. PLoS Computational Biology, 9 (7), e1003149.
How To Do Science Copyright © 2022 by University of Southern Queensland is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License , except where otherwise noted.
Table of Contents
As a young researcher, you might wonder how to start writing your first review article, and the extent of the information that it should contain. A review article is a comprehensive summary of the current understanding of a specific research topic and is based on previously published research. Unlike research papers, it does not contain new results, but can propose new inferences based on the combined findings of previous research.
Review articles are typically of three types: literature reviews, systematic reviews, and meta-analyses.
A literature review is a general survey of the research topic and aims to provide a reliable and unbiased account of the current understanding of the topic.
A systematic review , in contrast, is more specific and attempts to address a highly focused research question. Its presentation is more detailed, with information on the search strategy used, the eligibility criteria for inclusion of studies, the methods utilized to review the collected information, and more.
A meta-analysis is similar to a systematic review in that both are systematically conducted with a properly defined research question. However, unlike the latter, a meta-analysis compares and evaluates a defined number of similar studies. It is quantitative in nature and can help assess contrasting study findings.
Here are a few practices that can make the time-consuming process of writing a review article easier:
Writing review articles, especially systematic reviews or meta-analyses, can seem like a daunting task. However, Elsevier Author Services can guide you by providing useful tips on how to write an impressive review article that stands out and gets published!
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In the biosciences, review articles written by researchers are valuable tools for those looking for a synopsis of several research studies in one place without having to spend time finding the research and results themselves. A well-presented review paper provides the reader with unbiased information on studies within the discipline and presents why the results of some research studies are or are not valid. In addition, institutions that fund research tend to use review articles to help them decide whether further research is necessary; however, their value is only as good as the objectives achieved and how the results are communicated.
The objective of a review should be “to achieve an organization and synthesis of past work around the chosen theme in order to accelerate the accumulation and assimilation of recent knowledge into the existing body of knowledge.” Importantly, a review should present results clearly and accurately—good writing is essential and must follow a strict set of rules.
In 1996, Quality of Reporting of Meta-analyses (QUOROM), which focused on meta-analyses of randomized controlled studies, was created during a conference involving a group of scientists, clinicians, and statisticians. The QUOROM statement, checklist, and flow diagram were introduced to researchers to help them better organize their reviews and ensure that specific criteria were followed. QUOROM was later updated and renamed Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) with the same values and criteria.
A review article is not an original study. It examines previous studies and compiles their data and evidence.
Based on their structure and formulation, literature reviews are broadly classified as-
Although narrative reviews can be useful, they are not in depth and do not necessarily analyze data or study-group sizes for determining whether results are valid. Systematic reviews , on the other hand, are more detailed and involve a more comprehensive literature search—they are the “gold standard” of review articles. A meta-analysis is a quantitative systematic review. It combines data from several studies to reach a conclusion that is statistically stronger than any in the single studies, mainly because of having more study subjects and more diversity among subjects.
A good review usually concentrates on a theme, such as different theories, information on the progress of developing a new medical device, or how past developments influence new discoveries. A review might also ask that more resources be used to continue research in that specific field.
There are advantages and disadvantages to writing a review . In addition to having more available data, other advantages include confirmatory data analysis and that reviews are considered to be an evidence-based resource. Some of the disadvantages are they are more time consuming and not all studies will provide the requisite amount of data. In addition, statistical functions and interpretations are more complex and authors must ensure that the populations from each study and all studies combined are heterogeneous.
Previous reviews on the chosen theme using Google Scholar can provide information on any new findings, and the following points should be considered when conducting searches:
Once the inclusion and exclusion criteria have been identified based on these points, authors are ready to prepare their paper. Sources such as Popular Science and WebMD.com should be avoided. These sources, among others, are not allowed to be used as sources for review articles. Authors must ensure that the sources are legitimate research studies and that they are similar in nature (e.g., all randomized controlled trials).
Maximum length can vary depending on the author guidelines from the journal to which you are submitting, so authors must always check those guidelines before they begin. As a general rule, most journals ask that a specific font and size be used (e.g., Times New Roman, 12 point), that 1.0-inch margins be used on all four sides, and 1.5 line spacing be used.
The article structure should contain very specific sections, which might vary slightly according to different science disciplines. In scientific writing, the IMRAD structure (introduction, methods, results, and discussion) is a standard format adopted by a majority of academic journals. Although specific author guidelines might vary, in most cases, the review paper should contain the following sections:
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Types of literature reviews Tips for writing review articles Role of meta-analysis Reporting guidelines
学术出版中综述文章的概述和意义 不同类型文献综述的比较分析 写好系统综述与叙述性综述的技巧 整合分析(meta-analysis)的作用
综述论文的种类-系统综述与叙述性综述 PRISMA 检核表及流程图 综述论文的组成 为您的综述选择合适的期刊以发表
Systematic and Non-Systematic Reviews PRISMA Flowcharts and Checklists Parts of a Review Article Drafting a…
What Is a Systematic Review in Research?
Systematic Review: Structure and Process
New Physics Framework by Dan S. Correnti: A Book Review
How Scholarly Book Review Differs from an Article Review
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In the medical sciences, the importance of review articles is rising. When clinicians want to update their knowledge and generate guidelines about a topic, they frequently use reviews as a starting point. The value of a review is associated with what has been done, what has been found and how these findings are presented. Before asking ‘how,’ the question of ‘why’ is more important when starting to write a review. The main and fundamental purpose of writing a review is to create a readable synthesis of the best resources available in the literature for an important research question or a current area of research. Although the idea of writing a review is attractive, it is important to spend time identifying the important questions. Good review methods are critical because they provide an unbiased point of view for the reader regarding the current literature. There is a consensus that a review should be written in a systematic fashion, a notion that is usually followed. In a systematic review with a focused question, the research methods must be clearly described. A ‘methodological filter’ is the best method for identifying the best working style for a research question, and this method reduces the workload when surveying the literature. An essential part of the review process is differentiating good research from bad and leaning on the results of the better studies. The ideal way to synthesize studies is to perform a meta-analysis. In conclusion, when writing a review, it is best to clearly focus on fixed ideas, to use a procedural and critical approach to the literature and to express your findings in an attractive way.
The importance of review articles in health sciences is increasing day by day. Clinicians frequently benefit from review articles to update their knowledge in their field of specialization, and use these articles as a starting point for formulating guidelines. [ 1 , 2 ] The institutions which provide financial support for further investigations resort to these reviews to reveal the need for these researches. [ 3 ] As is the case with all other researches, the value of a review article is related to what is achieved, what is found, and the way of communicating this information. A few studies have evaluated the quality of review articles. Murlow evaluated 50 review articles published in 1985, and 1986, and revealed that none of them had complied with clear-cut scientific criteria. [ 4 ] In 1996 an international group that analyzed articles, demonstrated the aspects of review articles, and meta-analyses that had not complied with scientific criteria, and elaborated QUOROM (QUality Of Reporting Of Meta-analyses) statement which focused on meta-analyses of randomized controlled studies. [ 5 ] Later on this guideline was updated, and named as PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses). [ 6 ]
Review articles are divided into 2 categories as narrative, and systematic reviews. Narrative reviews are written in an easily readable format, and allow consideration of the subject matter within a large spectrum. However in a systematic review, a very detailed, and comprehensive literature surveying is performed on the selected topic. [ 7 , 8 ] Since it is a result of a more detailed literature surveying with relatively lesser involvement of author’s bias, systematic reviews are considered as gold standard articles. Systematic reviews can be diivded into qualitative, and quantitative reviews. In both of them detailed literature surveying is performed. However in quantitative reviews, study data are collected, and statistically evaluated (ie. meta-analysis). [ 8 ]
Before inquring for the method of preparation of a review article, it is more logical to investigate the motivation behind writing the review article in question. The fundamental rationale of writing a review article is to make a readable synthesis of the best literature sources on an important research inquiry or a topic. This simple definition of a review article contains the following key elements:
For the specification of important questions to be answered, number of literature references to be consulted should be more or less determined. Discussions should be conducted with colleagues in the same area of interest, and time should be reserved for the solution of the problem(s). Though starting to write the review article promptly seems to be very alluring, the time you spend for the determination of important issues won’t be a waste of time. [ 9 ]
The PRISMA statement [ 6 ] elaborated to write a well-designed review articles contains a 27-item checklist ( Table 1 ). It will be reasonable to fulfill the requirements of these items during preparation of a review article or a meta-analysis. Thus preparation of a comprehensible article with a high-quality scientific content can be feasible.
PRISMA statement: A 27-item checklist
Title | ||
Title | 1 Identify the article as a systematic review, meta-analysis, or both | |
Summary | ||
Structured summary | 2 Write a structured summary including, as applicable, background; objectives; data sources; study eligibility criteria, participants, treatments, study appraisal and synthesis methods; results; limitations; conclusions and implications of key findings; and systematic review registration number | |
Introduction | ||
Rationale | 3 Explain the rationale for the review in the context of what is already known | |
Objectives | 4 Provide an explicit statement of questions being addressed with reference to participants, interventions, comparisons, outcomes, and study design (PICOS) | |
Methods | ||
Protocol and registration | 5 Indicate if a review protocol exists, if and where it can be accessed (such as a web address), and, if available, provide registration information including the registration number | |
Eligibility criteria | 6 Specify study characteristics (such as PICOS, length of follow-up) and report characteristics (such as years considered, language, publication status) used as criteria for eligibility, giving rationale | |
Sources of Information | 7 Describe all information sources in the survey (such as databases with dates of coverage, contact with study authors to identify additional studies) and date last searched | |
Survey | 8 Present the full electronic search strategy for at least one major database, including any limits used, such that it could be repeated | |
Study selection | 9 State the process for selecting studies (that is, for screening, for determining eligibility, for inclusion in the systematic review, and, if applicable, for inclusion in the meta-analysis) | |
Data collection process | 10 Describe the method of data extraction from reports (such as piloted forms, independently by two reviewers) and any processes for obtaining and confirming data from investigators | |
Data items | 11 List and define all variables for which data were sought (such as PICOS, funding sources) and any assumptions and simplifications made | |
Risk of bias in individual studies | 12 Describe methods used for assessing risk of bias in individual studies (including specification of whether this was done at the study or outcome level, or both), and how this information is to be used in any data synthesis | |
Summary measures | 13 State the principal summary measures (such as risk ratio, difference in means) | |
Synthesis of outcomes | 14 For each meta-analysis, explain methods of data use, and combination methods of study outcomes, and if done consistency measurements should be indicated (ie P test) | |
Risk of bias across studies | 15 Specify any assessment of risk of bias that may affect the cumulative evidence (such as publication bias, selective reporting within studies). | |
Additional analyses | 16 Describe methods of additional analyses (such as sensitivity or subgroup analyses, meta-regression), if done, indicating which were pre-specified. | |
Results | ||
Study selection | 17 Give numbers of studies screened, assessed for eligibility, and included in the review, with reasons for exclusions at each stage, ideally with a flow diagram. | |
Study characteristics | 18 For each study, present characteristics for which data were extracted (such as study size, PICOS, follow-up period) and provide the citation. | |
Risk of bias within studies | 19 Present data on risk of bias of each study and, if available, any outcome-level assessment (see item 12) | |
Results of individual studies | 20 For all outcomes considered (benefits and harms), present, for each study, simple summary data for each intervention group and effect estimates and confidence intervals, ideally with a forest plot (a type of graph used in meta-analyses which demonstrates relat, ve success rates of treatment outcomes of multiple scientific studies analyzing the same topic) | |
Syntheses of resxults | 21 Present the results of each meta-analyses including confidence intervals and measures of consistency | |
Risk of bias across studies | 22 Present results of any assessment of risk of bias across studies (see item 15). | |
Additional analyses | 23 Give results of additional analyses, if done such as sensitivity or subgroup analyses, meta-regression (see item 16) | |
Discussion | ||
Summary of evidence | 24 Summarize the main findings, including the strength of evidence for each main outcome; consider their relevance to key groups (such as healthcare providers, users, and policy makers) | |
Limitations | 25 Discuss limitations at study and outcome level (such as risk of bias), and at review level such as incomplete retrieval of identified research, reporting bias | |
Conclusions | 26 Provide a general interpretation of the results in the context of other evidence, and implications for future research | |
Funding | ||
Funding | 27 Indicate sources of funding or other support (such as supply of data) for the systematic review, and the role of funders for the systematic review |
Important differences exist between systematic, and non-systematic reviews which especially arise from methodologies used in the description of the literature sources. A non-systematic review means use of articles collected for years with the recommendations of your colleagues, while systematic review is based on struggles to search for, and find the best possible researches which will respond to the questions predetermined at the start of the review.
Though a consensus has been reached about the systematic design of the review articles, studies revealed that most of them had not been written in a systematic format. McAlister et al. analyzed review articles in 6 medical journals, and disclosed that in less than one fourth of the review articles, methods of description, evaluation or synthesis of evidence had been provided, one third of them had focused on a clinical topic, and only half of them had provided quantitative data about the extend of the potential benefits. [ 10 ]
Use of proper methodologies in review articles is important in that readers assume an objective attitude towards updated information. We can confront two problems while we are using data from researches in order to answer certain questions. Firstly, we can be prejudiced during selection of research articles or these articles might be biased. To minimize this risk, methodologies used in our reviews should allow us to define, and use researches with minimal degree of bias. The second problem is that, most of the researches have been performed with small sample sizes. In statistical methods in meta-analyses, available researches are combined to increase the statistical power of the study. The problematic aspect of a non-systematic review is that our tendency to give biased responses to the questions, in other words we apt to select the studies with known or favourite results, rather than the best quality investigations among them.
As is the case with many research articles, general format of a systematic review on a single subject includes sections of Introduction, Methods, Results, and Discussion ( Table 2 ).
Structure of a systematic review
Introduction | Presents the problem and certain issues dealt in the review article |
Methods | Describes research, and evaluation process Specifies the number of studies evaluated orselected |
Results | Describes the quality, and outcomes of the selected studies |
Discussion | Summarizes results, limitations, and outcomes of the procedure and research |
Steps, and targets of constructing a good review article are listed in Table 3 . To write a good review article the items in Table 3 should be implemented step by step. [ 11 – 13 ]
Steps of a systematic review
Formulation of researchable questions | Select answerable questions |
Disclosure of studies | Databases, and key words |
Evaluation of its quality | Quality criteria during selection of studies |
Synthesis | Methods interpretation, and synthesis of outcomes |
It might be helpful to divide the research question into components. The most prevalently used format for questions related to the treatment is PICO (P - Patient, Problem or Population; I-Intervention; C-appropriate Comparisons, and O-Outcome measures) procedure. For example In female patients (P) with stress urinary incontinence, comparisons (C) between transobturator, and retropubic midurethral tension-free band surgery (I) as for patients’ satisfaction (O).
In a systematic review on a focused question, methods of investigation used should be clearly specified.
Ideally, research methods, investigated databases, and key words should be described in the final report. Different databases are used dependent on the topic analyzed. In most of the clinical topics, Medline should be surveyed. However searching through Embase and CINAHL can be also appropriate.
While determining appropriate terms for surveying, PICO elements of the issue to be sought may guide the process. Since in general we are interested in more than one outcome, P, and I can be key elements. In this case we should think about synonyms of P, and I elements, and combine them with a conjunction AND.
One method which might alleviate the workload of surveying process is “methodological filter” which aims to find the best investigation method for each research question. A good example of this method can be found in PubMed interface of Medline. The Clinical Queries tool offers empirically developed filters for five different inquiries as guidelines for etiology, diagnosis, treatment, prognosis or clinical prediction.
As an indispensable component of the review process is to discriminate good, and bad quality researches from each other, and the outcomes should be based on better qualified researches, as far as possible. To achieve this goal you should know the best possible evidence for each type of question The first component of the quality is its general planning/design of the study. General planning/design of a cohort study, a case series or normal study demonstrates variations.
A hierarchy of evidence for different research questions is presented in Table 4 . However this hierarchy is only a first step. After you find good quality research articles, you won’t need to read all the rest of other articles which saves you tons of time. [ 14 ]
Determination of levels of evidence based on the type of the research question
I | Systematic review of Level II studies | Systematic review of Level II studies | Systematic review of Level II studies | Systematic review of Level II studies |
II | Randomized controlled study | Crross-sectional study in consecutive patients | Initial cohort study | Prospective cohort study |
III | One of the following: Non-randomized experimental study (ie. controlled pre-, and post-test intervention study) Comparative studies with concurrent control groups (observational study) (ie. cohort study, case-control study) | One of the following: Cross-sectional study in non-consecutive case series; diagnostic case-control study | One of the following: Untreated control group patients in a randomized controlled study, integrated cohort study | One of the following: Retrospective cohort study, case-control study (Note: these are most prevalently used types of etiological studies; for other alternatives, and interventional studies see Level III |
IV | Case series | Case series | Case series or cohort studies with patients at different stages of their disease states |
Rarely all researches arrive at the same conclusion. In this case a solution should be found. However it is risky to make a decision based on the votes of absolute majority. Indeed, a well-performed large scale study, and a weakly designed one are weighed on the same scale. Therefore, ideally a meta-analysis should be performed to solve apparent differences. Ideally, first of all, one should be focused on the largest, and higher quality study, then other studies should be compared with this basic study.
In conclusion, during writing process of a review article, the procedures to be achieved can be indicated as follows: 1) Get rid of fixed ideas, and obsessions from your head, and view the subject from a large perspective. 2) Research articles in the literature should be approached with a methodological, and critical attitude and 3) finally data should be explained in an attractive way.
Written by: Katherine Watson
Starting a literature review can be a daunting task. A literature review is a foundational aspect of a dissertation, but you may also be asked to produce a standalone literature review. You may be unfamiliar with the term literature review, and the first thing to note is that it is not that different to essays you are used to writing….
A literature review is a critical summary of existing work on a chosen topic. Importantly, it is not a list or description of ALL texts relevant to your topic. Your literature review should pick up on important ideas, debates, theories, methods and omissions across this body of literature. Rather than repeating or re-wording this information, a literature review represents your own evaluations and comparisons between these texts and should highlight your key take-aways from those readings.
It is important to be selective, you don’t have time to read everything. Tips on how to be a more effective and efficient reader can be found on Read Right, Write Right.
While the body of literature may be large, you will typically find repetition and common ground between texts. Make a note of these similarities, as well as where approaches or arguments diverge and contrast.
Weed out any sources which are not relevant after your reading and consolidate your list/table of core literature.
This is your opportunity to elaborate on your record of core literature by producing your own summary and reflection of the texts. Return to any notes you’ve written already and re-read relevant sections of the texts if necessary. Don’t just repeat their arguments (though you may note down a small number of quotations). Keep your focal topic at the front of your mind!
The questions listed below can be used as prompts to get you thinking critically:
As you think, WRITE ! What to do with all of those notes will help you process your ideas, and these notes will likely find their way into your literature review as your start to write it up formally.
A scientific review article is a type of academic paper that provides a comprehensive and systematic summary and analysis of existing research on a particular topic within the scientific literature. unlike original research articles, which present new data and findings, review articles aim to synthesize and critically evaluate the existing knowledge on a specific subject., when reading or , writing a review article consider:.
Comprehensive Literature Review : The primary purpose of a review article is to offer a thorough overview of the current state of knowledge on a given topic. This involves summarizing and synthesizing information from a wide range of relevant research studies.
Critical Analysis: Review articles often involve critical analysis and evaluation of the strengths and weaknesses of various studies. Authors may discuss methodological approaches, experimental designs, limitations, and potential biases of the research they review.
Organization: Review articles typically have a well-organized structure. They may start with an introduction to the topic, followed by sections that cover different aspects or subtopics related to the main theme. The article may conclude with a summary of the current state of the field and suggestions for future research directions.
Citations: Review articles heavily rely on citations to other scientific papers. They provide a comprehensive list of references, allowing readers to explore the original studies for more in-depth information.
Objective Tone: While review articles may include the authors’ interpretations and insights, they generally maintain an objective and unbiased tone. The goal is to present a balanced overview of the existing literature.
Target Audience: Review articles are valuable for both experts in the field and those seeking an introduction to a specific topic. They can serve as educational resources for students, researchers, and professionals.
Review articles play a crucial role in advancing scientific knowledge by synthesizing and summarizing existing research, identifying trends, and highlighting gaps in current understanding. They are often published in academic journals, and their importance lies in providing researchers with a comprehensive resource for staying informed about developments in their field.
Writing a scientific review article involves a systematic process to ensure a comprehensive and well-organized presentation of existing research on a particular topic. Here’s a step-by-step guide to help you write a scientific review article:
Choose a Topic:
Conduct a Literature Review :
Organize Your Material :
Write the Introduction:
Write the Main Body:
Include Subheadings:
Provide Clear Transitions:
Include Citations:
Write the Conclusion:
Revise and Edit:
Format Your Manuscript:
Submit for Peer Review:
Writing a scientific review article requires careful planning, attention to detail, and a critical evaluation of the literature. Remember to maintain objectivity, provide a synthesis of existing knowledge, and contribute insights that will benefit the scientific community.
The aim of this study was to compare the effectiveness between an automated bilingual computerized alcohol screening and intervention (AB-CASI) digital health tool versus standard care for reduction of ROH consumption in US adult Latino population affected by unhealthy drinking at the ED. According to the World Health Organization, “alcohol-related visits to EDs increased by 61.6%, including increases of more than 51% for acute alcohol-related visits and more than 75% for chronic alcohol-related visits” from 2006 to 2014 (World Health Organization, 2018) . Screening and counseling programs inside the emergency department like the ED-SBIRT (ED screening, brief intervention, and referral to treatment) has been linked to reductions of ROH consumption and adverse consequences. This randomized clinical study analysed the effectiveness of AB-CASI versus standard care among 840 self-identified adult Latino patients in the ED with unhealthy drinking habits from 2014 to 2020 at the ED of a major tertiary care center in the US. The AB-CASI group received alcohol screening and a brief negative interview (BNI) in their preferred language while the standard care group received standard emergency medical care with information concerning recommended follow-up. The AB-CASI group showed a significant reduction (3.2; 95% CI, 2.7-3.8) compared to the standard care group (4.0; 95% CI, 3.4-4.7) at 12 months in number of drinking episodes within the last 28 days at 12 months after randomization.
In the United States, about one-third of all adults will meet the diagnostic of alcohol use disorder (AUD) in the Diagnostic and Statistical Manual for Mental Disorders, 5 th edition (DSM-5) in their lifetime. Furthermore, it is estimated that around 15.1 million US adults meet these criteria in the previous 12 months (Witkiewitz et al., 2019) . In the United States, the Latino population represents the largest minority group with over 60 million people and are considered the fastest growing population in the country, second to Asian Americans. Many articles have described the risk factors present in the Latino population (psychological, social, cultural) leading to alcohol and substance misuse. The literature also shows a link between ethnic discrimination and higher risk of alcohol use disorder. In fact, Kcomt et al. demonstrates that ethnic discrimination is associated with past-year AUD in the Latino population and the association is even greater in sexual minority Latino adults experiencing ethnic and sexual discrimination concomitantly (Kcomt et al., 2023) . Pathological alcohol use worsens the global burden of disease and a correlation has been established between alcohol consumption and over 200 health conditions (World Health Organization, 2018) . In a large retrospective population study conducted in Canada, the increase in rates of ED consultations linked to alcohol use was 4.4 times greater than the increase in rates of overall ED visits between 2003 and 2016 (Myran et al., 2019) . With the increase in alcohol related consultations in emergency rooms, it is important to educate and equip ourselves to better take care of our patients presenting with alcohol-related complaints. At present, few tools are used in the ED to screen patients for alcohol use. In a recent study, Uong et al. showed that no greater than 1 in 6 emergency department physicians screened their patients for excessive alcohol usage (Uong et al., 2022) . The current research aim was to “compare the effectiveness of an automated bilingual computerized alcohol screening and intervention (AB-CASI) digital health tool with standard care for the reduction of alcohol consumption among US adult Latino emergency department (ED) patients with unhealthy drinking” (Vaca et al., 2023) . The authors hypothesized that at 12 months, the AB-CASI group would experience less binge drinking episodes than the standard care group. They also hypothesized that the AB-CASI group would have a reduced mean number of weekly standard drinks over the last 28 days.
This study utilized an unblinded parallel-group randomized controlled trial (RCT) conducted in both English and Spanish languages. It aimed to evaluate the efficacy of AB-CASI in reducing alcohol use among adult Latino ED patients compared to standard care. The study included self- identified adult Latino ED patients with unhealthy drinking habits. Exclusion criteria encompassed current enrollment in treatment programs, pregnancy and conditions that hindered interview use (psychotic, homicidal or suicidal thoughts). The AB-CASI intervention comprised an AUDIT assessment, brief negotiation interview (BNI) and culturally-tailored components. Participants received personalized plans and counseling referrals in their language. Participants in the standard care group received conventional emergency medical care, which included an informational sheet and the possibility of a social worker consultation.
The study procedure involved obtaining consent and a health quiz from ED patients self-identifying as Latino ethnicity with unhealthy drinking habits. Assessments were conducted at baseline, 1 month, 6 months and 12 months. These assessments included the Alcohol Use Disorders Identification Test (AUDIT), timeline follow-back (TLFB), injury assessment, problem inventory, brief event data report and treatment services review, all administered by trained research assistants. The primary outcome measure was self-reported binge drinking episodes over the past 28 days at the 12-month mark. Secondary outcomes encompassed the mean weekly standard drinks and alcohol-related adverse health behaviors and consequences. Statistical analyses adhered to the intention-to-treat principle and were performed using version 9.4 of the SAS software.
A repeated-measures generalized linear mixed model (GLMM) was employed with a negative binomial distribution to estimate the primary outcome differences between the AB-CASI and standard care groups. This GLMM simultaneously modeled the number of binge drinking episodes at baseline, 1 month, 6 months and 12 months. It adjusted the estimates of treatment effects based on the baseline number of binge drinking episodes. Fixed effects included intervention, time and their interaction, along with baseline covariates like sex, preferred language and alcohol dependence status. The analysis included all randomized participants and assumed that missing data occurred randomly. Linear contrasts were used to estimate intervention group differences at 1, 6 and 12 months with a significance level of 2-sided p = .05. Relative differences (RD) between groups, represented as the ratio of the mean number of binge drinking episodes in the last 28 days in the AB-CASI group to the standard care group were reported with 95% confidence intervals. Similar mixed-model analyses were conducted for secondary outcomes. To control inflated type 1 errors from multiple significance testing, the significance level for secondary outcomes was set at 2-sided p = .01. Subgroup analyses based on baseline factors, such as age, sex, biculturalism score and primary reason for ED visit, assessed the heterogeneity of treatment effects on the primary outcome. Biculturalism scores which measured levels of Hispanicism and Americanism were determined using the Bicultural Involvement Questionnaire – Short Version. These scores represented an approximation of different levels of acculturation.’
Primary Outcomes
In both the AB-CASI group and the standard care group, the mean number of binge drinking episodes within the last 28 days was 7.7 (95% CI, 6.9-8.7 for both groups) at baseline. In the AB-CASI group, this number decreased to 3.5 (95% CI, 3.0-4.2) at 1 month, 3.4 (95% CI, 2.9-4.1) at 6 months and 3.2 (95% CI, 2.7-3.8) at 12 months. Conversely, the standard care group showed a decrease to 3.9 (95% CI, 3.3-4.6) at 1 month, 3.1 (95% CI, 2.6-3.7) at 6 months and 4.0 (95% CI, 3.4-4.7) at 12 months. The number of binge drinking episodes within 28 days at 12 months after randomization was significantly lower in the AB-CASI group compared to the standard care group (RD, 0.79; 95% CI, 0.64-0.99). The Relative Difference (RD) of 0.79 shows that the mean number of binge drinking episodes within the last 28 days in the AB-CASI group was 79% of the mean number in the standard care group.
Secondary Outcomes
In the AB-CASI group, the mean number of weekly standard drinks revealed a decrease from 22.8 (95% CI, 20.8-25.1) at baseline to 12.4 (95% CI, 10.8-14.1) at 1 month, 11.6 (95% CI, 10.1-13.4) at 6 months and 10.0 (95% CI, 8.6-11.5) at 12 months. In contrast, the standard care group recorded a mean number of weekly standard drinks of 22.8 (95% CI, 20.8-25.1) at baseline, which then dropped to 12.2 (95% CI, 10.7-13.9) at 1 month, 10.5 (95% CI, 9.1-12.1) at 6 months and 12.3 (95% CI, 10.7-14.1) at 12 months. At the 12-month mark, the mean number of weekly standard drinks in the AB-CASI group was 19% lower than in the standard care group (RD, 0.81; 99% CI, 0.64-1.02). However, this difference did not attain statistical significance. Additionally over the course of 12 months, the study found no substantial differences in alcohol-related adverse health behaviors and consequences between the two groups.
Exploratory Subgroup Analyses
The influence at 12 months of AB-CASI on the number of binge drinking episodes within the last 28 days was subject to modifications based on the participants age and the primary reason for their ED visit. Among those aged 25 years or older, binge drinking episodes were 30% lower in the AB-CASI group compared to those 25 years or younger (RD, 0.70; 95% CI, 0.54-0.89).
For the latter group, the point estimate for binge drinking episodes was 40% higher (RD, 1.40;95% CI, 0.85-2.31; P = .01 for interaction) in the AB-CASI group compared to the standard care group. However, the 95% confidence intervals had large variability due to small size of the subgroup aged 25 or younger (n = 176).
Additionally, the magnitude of the reduction associated with AB-CASI was more pronounced in participants whose ED visit was primarily related to alcohol issues (RD, 0.18; 95% CI, 0.04-0.86) as compared to those with primary medical-related reasons (RD, 0.83; 95% CI, 0.67-1.05) or primary psychiatric-related reasons (RD, 0.34; 95% CI, 0.05-2.18; P = .04 for interaction).
This study is the first US randomized controlled trial of Emergency Department Screening, Brief Intervention, and Referral to Treatment (ED-SBIRT) using an automated bilingual digital health tool. The research question aimed to compare the effectiveness of an automated bilingual computerized alcohol screening and intervention (AB-CASI) digital health tool with standard care for reducing alcohol consumption among US adult Latino emergency department (ED) patients with unhealthy drinking habits.
AB-CASI emerged as a more effective intervention, outperforming standard care by reducing the average number of binge drinking episodes within 28 days by 21%. This 21% reduction equals to almost a full episode which is clinically significant given the adverse effects of binge drinking on end organs.
The study’s limitations include its confinement to a single ED in the US with a study population primarily of Puerto Rican descent therefore lacking heterogeneity in the studied population. Subjects’ unavailability for follow-up creates attrition bias which can modify the results of the study. Furthermore, the use of DSM-IV criteria for AUD instead of the DSM-V criteria is a notable limitation with the updated version of the DSM being used today.
However, the results of this study hold substantial significance. They underscore the burden of Alcohol Use Disorder (AUD) in the United States and reveal critical alcohol-related health disparities within the Latino community, the country’s largest ethnic minority group. The AB-CASI tool offers a quick and cost-effective means to address these disparities, especially among unilingual individuals. Implementing adapted ED-SBIRT within emergency departments also proves to be a more cost-effective approach compared to delivering SBIRT in other outpatient medical settings.
In summary, this study sheds light on the effectiveness of ED-SBIRT using AB-CASI in reducing alcohol consumption among Latino ED patients with unhealthy drinking habits. It carries implications for public health by demonstrating a feasible, efficient and cost-effective approach to addressing AUD and its associated disparities within the Latino population, while also serving as an example for bilingual, digital health interventions in emergency care.
Kcomt, L., Boyd, C.J., Evans-Polce, R.J., Veliz, P., Engstrom, C., West, B.T., McCabe, S.E., 2023. Ethnic Discrimination, Sexual Orientation Discrimination, and DSM-5 Alcohol Use Disorder Among U.S. Latino or Hispanic Adults. J. Homosex. 1–21. https://doi.org/10.1080/00918369.2023.2217516
Myran, D.T., Hsu, A.T., Smith, G., Tanuseputro, P., 2019. Rates of emergency department visits attributable to alcohol use in Ontario from 2003 to 2016: a retrospective population-level study. CMAJ 191, E804–E810. https://doi.org/10.1503/cmaj.181575
Uong, S., Tomedi, L.E., Gloppen, K.M., Stahre, M., Hindman, P., Goodson, V.N., Crandall, C., Sklar, D., Brewer, R.D., 2022. Screening for Excessive Alcohol Consumption in Emergency Departments: A Nationwide Assessment of Emergency Department Physicians. J. Public Health Manag. Pract. JPHMP 28, E162–E169. https://doi.org/10.1097/PHH.0000000000001286
Vaca, F.E., Dziura, J., Abujarad, F., Pantalon, M., Hsiao, A., Reynolds, J., Maciejewski, K.R., Field, C.A., D’Onofrio, G., 2023. Use of an Automated Bilingual Digital Health Tool to Reduce Unhealthy Alcohol Use Among Latino Emergency Department Patients. JAMA Netw. Open 6, e2314848. https://doi.org/10.1001/jamanetworkopen.2023.14848 Witkiewitz, K., Litten, R.Z., Leggio, L., 2019. Advances in the science and treatment of alcohol use disorder. Sci. Adv. 5, eaax4043. https://doi.org/10.1126/sciadv.aax4043 World Health Organization, 2018. Global status report on alcohol and health 2018. World Health Organization, Geneva
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What is "Science Writing?"
At first glance, science writing seems simple. It's writing about topics related to science and can include works of creative nonfiction, nature essays, or scientific articles. But science writing is different from scientific writing. While scientific writing is usually intended for a specialized audience of scientists and researchers, science writing brings important scientific discoveries into the lives of the general public in creative and meaningful ways. Pieces of science writing can be very different from one another and can come in a number of formats. They can be long or short, detailed or generalized. They can be articles, books, videos, essays, podcasts, and more.
This page serves as a guide for discovering credible science writing sources and connecting various fields of study. Scientists, students, educators, and writers can use it to find articles, videos, books, and other examples of science writing to support their interests. Whether you are an avid reader or an aspiring science writer, this guide is for you!
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Try browsing the library shelves for science writing material in these areas, or explore the Science Writing collection online.
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Structure of a Scientific Review Article. Writing a high-quality scientific review article is "a balancing act between the scientific rigor needed to select and critically appraise original studies, and the art of telling a story by providing context, exploring the known and the unknown, and pointing the way forward" . The ideal scientific ...
The best proposals are timely and clearly explain why readers should pay attention to the proposed topic. It is not enough for a review to be a summary of the latest growth in the literature: the ...
A good review article provides readers with an in-depth understanding of a field and highlights key gaps and challenges to address with future research. Writing a review article also helps to expand the writer's knowledge of their specialist area and to develop their analytical and communication skills, amongst other benefits.
Writing a review article is equivalent to conducting a research study, with the information gathered by the author (reviewer) representing the data. Like all major studies, it involves conceptualisation, planning, implementation, and dissemination [], all of which may be detailed in a methodology section, if necessary.
Literature reviews are in great demand in most scientific fields. Their need stems from the ever-increasing output of scientific publications .For example, compared to 1991, in 2008 three, eight, and forty times more papers were indexed in Web of Science on malaria, obesity, and biodiversity, respectively .Given such mountains of papers, scientists cannot be expected to examine in detail every ...
A good review article provides readers with an in-depth understanding of a field and highlights key gaps and challenges to address with future research. Writing a review article also helps to expand the writer's knowledge of their specialist area and to develop their analytical and communication skills, amongst other benefits. Thus, the ...
A well-written review article must summarize key research findings, reference must-read articles, describe current areas of agreement as well as controversies and debates, point out gaps in current knowledge, depict unanswered questions, and suggest directions for future research (1). During the last decades, there has been a great expansion in ...
When drawing up an initial outline, consider any unique features of the article type that you're develop-ing and always refer to the journal's guidelines on word, page and reference limits. Most review articles are between 4000 and 6000 words in length and as a rule of thumb, 8090% of the text should be within. -.
Scientific review articles are comprehensive, focused reviews of the scientific literature written by subject matter experts. The task of writing a scientific review article can seem overwhelming ...
A good review article provides readers with an in-depth understanding of a field and highlights key gaps and challenges to address with future research. Writing a review article also helps to expand the writer's knowledge of their specialist area and to develop their analytical and communication skills, amongst other benefits. Thus, the ...
22 Sep 2016. By Elisabeth Pain. Share: A good peer review requires disciplinary expertise, a keen and critical eye, and a diplomatic and constructive approach. Credit: dmark/iStockphoto. As junior scientists develop their expertise and make names for themselves, they are increasingly likely to receive invitations to review research manuscripts.
You should now have a list of comments and suggestions for a complete peer review. The full peer-review document can comprise the following sections: 1. Introduction: Mirror the article, state ...
This article, which focuses on the narrative or traditional literature review, is intended to serve as a guide with practical steps for new writers. Tips for success are also discussed, including selecting a focused topic, maintaining objectivity and balance while writing, avoiding tedious data presentation in a laundry list format, moving from ...
Choose the topic and outline the organization of the review. Once you start reading, there will be a temptation to include every piece of information that was ever published. Obviously this isn't possible. So, define your scope from the onset. Perhaps you, a colleague, or your adviser was invited to write on a particular topic.
Actions to Take. 1. Skim the article without taking notes: Read the abstract. The abstract will tell you the major findings of the article and why they matter. Read first for the "big picture.". Note any terms or techniques you need to define. Jot down any questions or parts you don't understand.
7 Writing a Literature Review . Hundreds of original investigation research articles on health science topics are published each year. It is becoming harder and harder to keep on top of all new findings in a topic area and - more importantly - to work out how they all fit together to determine our current understanding of a topic.
Describe the title, abstract, and introduction: A good starting point to begin structuring your review is by drafting the title, abstract, and introduction. Explicitly writing down what your review aims to address in the field will help shape the rest of your article. Be unbiased and critical: Evaluate every piece of evidence in a critical but ...
We describe here the basic steps to follow in writing a scientific article. We outline the main sections that an average article should contain; the elements that should appear in these sections, and some pointers for making the overall result attractive and acceptable for publication. 1.
How to write and review a review article. In 2016 David Cook wrote an editorial for Medical Education on tips for a great review article. 13 These tips are excellent suggestions for all types of articles you are considering to submit to the CMEJ. First, start with a clear question: focused or more general depending on the type of review you are ...
Start early, spend time reading literature extensively, and pen your thoughts as you go along. Make an outline and decide on the main topic for the review. It is easy to digress and include all the information in the field; however, this would not be useful to readers. Be aware of journal requirements.
As a general rule, most journals ask that a specific font and size be used (e.g., Times New Roman, 12 point), that 1.0-inch margins be used on all four sides, and 1.5 line spacing be used. The article structure should contain very specific sections, which might vary slightly according to different science disciplines.
The fundamental rationale of writing a review article is to make a readable synthesis of the best literature sources on an important research inquiry or a topic. This simple definition of a review article contains the following key elements: The question (s) to be dealt with.
Think about structuring your review like an inverted pyramid. Put the most important information at the top, followed by details and examples in the center, and any additional points at the very bottom. Here's how your outline might look: 1. Summary of the research and your overall impression. In your own words, summarize what the manuscript ...
Starting a literature review can be a daunting task. A literature review is a foundational aspect of a dissertation, but you may also be asked to produce a standalone literature review. You may be unfamiliar with the term literature review, and the first thing to note is that it is not that different to essays you are used to writing….
How to Write a Review Article Cite this article as: How to Write a Review Article (2023). Phan. P. 10.55157/CS20231117 A scientific review article is a type of academic paper that provides a comprehensive and systematic summary and analysis of existing research on a particular topic within the scientific literature. Unlike original research articles, which […]
What is "Science Writing?" At first glance, science writing seems simple. It's writing about topics related to science and can include works of creative nonfiction, nature essays, or scientific articles. But science writing is different from scientific writing. While scientific writing is usually intended for a specialized audience of scientists and researchers, science writing brings ...