Systematic Review
Writing Service
A systematic review is the gold standard of evidence synthesis β the most rigorous, most trusted, most demanding form of academic literature work you can produce. It follows explicit pre-specified methods, minimises bias at every stage, and produces findings that carry genuine scholarly weight. We know exactly how to produce one that meets publication and dissertation standards.
Where Systematic Reviews Sit
HIGHEST QUALITY EVIDENCE AT TOP
PRISMA 2020 β 27 Reporting Items
Every systematic review we produce follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA 2020) statement β the internationally accepted standard for transparent, reproducible evidence synthesis.
What Is a Systematic Review β and Why Is It the Most Demanding Form of Academic Literature Work?
You have almost certainly read one. If you have ever looked at the evidence base for a clinical guideline, a public health intervention, an educational policy, or a psychological treatment protocol, you have encountered the conclusions of a systematic review. The systematic review is the document that sits at the apex of the evidence hierarchy β above individual studies, above expert opinion, above even well-conducted randomised controlled trials β because it synthesises all available evidence on a question using a methodology that is itself rigorous, transparent, and reproducible.
The formal definition, as provided by the Cochrane Collaboration β the world’s foremost authority on systematic review methodology β is precise: a systematic review is “a review of a clearly formulated question that uses systematic and reproducible methods to identify, select and critically appraise all relevant research, and to collect and analyse data from the studies that are included in the review.” Every word in that definition matters. Clearly formulated question. Systematic and reproducible methods. All relevant research. Critically appraise. These four requirements are what distinguish a systematic review from a narrative literature review, a scoping review, or a general academic survey of a field.
A narrative literature review β the kind you likely encountered in undergraduate essays or as a literature review chapter in a conventional dissertation β is selective by nature. The author surveys the relevant literature, selects sources that illuminate the topic, and synthesises them according to a structure they themselves determine. The process is scholarly, but it is not pre-specified, not exhaustive, and not reproducible: a different author reviewing the same literature would likely reach different conclusions. That subjectivity is what limits the evidential weight of a narrative review.
A systematic review eliminates that subjectivity through methodology. Before a single database search is conducted, the systematic review researcher produces a protocol β a pre-registered document that specifies the research question, the inclusion and exclusion criteria, the databases to be searched, the search terms and Boolean operators to be used, the screening procedure, the data extraction framework, the quality appraisal tool, and the synthesis method. Everything is specified in advance. Everything is documented. The process can be replicated by another researcher. The conclusions can be evaluated against the methodology. That transparency and replicability is why systematic reviews carry the evidential weight they do β and why they are increasingly required as the methodology of choice for doctoral dissertations and postgraduate theses across health sciences, social sciences, education, psychology, and management.
“Systematic reviews aim to minimise bias and provide more reliable findings from which conclusions can be drawn and decisions made.”
β Cochrane Handbook for Systematic Reviews of Interventions, Version 6.4 (2023)The intellectual demand of a systematic review is substantial. You must construct a search strategy sensitive enough to identify all relevant studies while specific enough to avoid drowning in irrelevant results. You must screen potentially thousands of titles and abstracts against pre-specified criteria. You must assess the methodological quality of every included study using validated appraisal tools. You must extract data systematically and consistently. You must synthesise that data β narratively, statistically, or through framework analysis β without introducing the interpretive bias that pre-specified methods are designed to prevent. And you must write all of this up in accordance with the PRISMA 2020 reporting standard, producing a manuscript that is transparent, detailed, and capable of passing peer review.
That is why students, researchers, and academics seek expert support for systematic reviews β not because they lack the intellectual capability to conduct one, but because the process is genuinely demanding in ways that go beyond conventional academic writing, requiring specialist knowledge of database search methodology, quality appraisal tools, and synthesis frameworks that are not routinely taught in most academic programmes until doctoral level.
Our systematic review writing service covers every stage of this process β from research question refinement and PICO framework development through protocol registration, database searching, dual screening, data extraction, risk-of-bias assessment, synthesis, PRISMA flow diagram production, and full manuscript write-up. We support dissertation-level systematic reviews, standalone academic papers aimed at journal submission, and systematic review chapters within doctoral theses. If you need a specific component rather than the full process β a search strategy, a PRISMA flow diagram, a synthesis write-up, a protocol β we handle individual components with the same rigour we bring to the whole.
Why the Systematic Review Has Become the Dominant Evidence Synthesis Method
The systematic review’s dominance in contemporary academic and policy-making contexts is not accidental. It emerged from a specific intellectual crisis in evidence-based medicine in the late 1980s and early 1990s, when it became clear that individual clinical trials were producing contradictory findings, and that clinical practice decisions based on any single study β however well-conducted β were vulnerable to the vagaries of that study’s specific population, setting, and measurement approach. The solution was synthesis: aggregate all the evidence on a question, weight it by quality, and derive a conclusion that reflected the totality of available knowledge rather than the findings of any one study.
The Cochrane Collaboration, established in 1993 and named after the British epidemiologist Archie Cochrane who had argued for decades for systematic collection and dissemination of trial results, institutionalised this approach. Cochrane systematic reviews became the gold standard β peer-reviewed, protocol-registered, methodologically explicit evidence syntheses that informed clinical guidelines, health policy, and research funding decisions globally. The methodology then spread beyond healthcare into social policy, education, psychology, management, and the social sciences, each discipline adapting the core systematic review methodology to its own evidentiary standards and research designs.
Today, the systematic review is not merely an academic exercise β it is a genre with real-world consequences. The clinical guidelines issued by the National Institute for Health and Care Excellence (NICE) in the UK, the U.S. Preventive Services Task Force, and the World Health Organization are all grounded in systematic reviews. When a nurse changes a wound care protocol, when a school adopts a new literacy programme, when a government revises its drug treatment policy, the evidentiary foundation is almost always a systematic review. Understanding how to produce one β and producing it to the standard that evidence-based practice requires β is one of the most practically significant academic skills a graduate researcher can develop.
PRISMA 2020: The International Standard for Systematic Review Reporting
The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) 2020 statement is not optional β it is the condition of credibility for any systematic review in peer-reviewed literature or academic assessment.
Title & Abstract
Identify the report as a systematic review or meta-analysis in the title. Provide a structured abstract covering all PRISMA items with sufficient detail for a standalone evidence summary.
Items 1β2Introduction & Methods
State the rationale, objectives, eligibility criteria, information sources, search strategy, selection process, data collection, and risk-of-bias assessment approach. Full reproducibility required.
Items 3β16Results
Report study selection (with PRISMA flow diagram), study characteristics, risk-of-bias results, individual study results, synthesis results, and certainty of evidence assessments.
Items 17β24Discussion & Other
Provide a full discussion interpreting results in context, addressing limitations, and discussing implications. Declare funding, competing interests, and protocol registration. Attach search strings.
Items 25β27PRISMA 2020 vs. PRISMA 2009: The 2020 update introduced significant changes from the 2009 version β including a redesigned flow diagram that distinguishes between database and citation searching, updated guidance on risk-of-bias assessment, and new items for protocol registration, certainty of evidence (GRADE), and funding sources. Most journals and academic institutions now require PRISMA 2020 compliance. We apply the 2020 standard as default and can produce both the updated flow diagram and the full PRISMA checklist as submission-ready documents.
The PRISMA Flow Diagram
The PRISMA flow diagram is a visual representation of the entire study selection process β one of the most scrutinised elements of any systematic review submission. The 2020 flow diagram tracks records identified through database searching and other sources separately, records removed before screening (duplicates, ineligible by study type/date), records screened at title/abstract level, full-text articles assessed for eligibility, and studies included in the final review. Each stage must be documented with exact numbers. Reasons for exclusion at full-text stage must be listed with the number of studies excluded for each reason.
We produce the PRISMA flow diagram as a submission-ready graphic in your required format (Word, PDF, or image file), populated with the exact numbers from your screening process. The diagram follows the updated PRISMA 2020 format exactly β not the outdated 2009 version that many templates on the internet still reflect.
For the protocol registration dimension: if your systematic review has not yet been registered with PROSPERO (the international prospective register of systematic reviews hosted by the University of York), we advise on registration and assist with the protocol documentation that PROSPERO registration requires. Pre-registration via PROSPERO or the Open Science Framework (OSF) is increasingly expected by journals and institutional review processes as a transparency mechanism.
GRADE and Certainty of Evidence
PRISMA 2020 introduced an explicit requirement to assess the certainty (quality) of the body of evidence for each outcome β using the GRADE (Grading of Recommendations Assessment, Development and Evaluation) approach. GRADE assesses evidence certainty across four levels β High, Moderate, Low, and Very Low β based on study design, risk of bias, inconsistency, indirectness, imprecision, and publication bias. A systematic review that does not include GRADE assessments is increasingly considered incomplete in health and social care disciplines.
GRADE assessments require domain-specific judgement about each certainty factor for each synthesised outcome. We produce GRADE summary-of-findings tables and evidence profiles in the format required by your target journal or institution. For reviews in clinical or health sciences disciplines, the GRADE assessment section is often one of the most technically demanding components β and one where our writers’ methodological expertise makes the most significant difference to the quality of the final document.
For disciplines where GRADE is less standard (social sciences, education, management), we use the GRADE-CERQual approach for qualitative evidence synthesis, the adapted GRADE approach for mixed-methods reviews, or equivalent certainty assessment frameworks as appropriate to your research question and methodology.
The PICO/PICOS Framework: Structuring Your Systematic Review Question
Before a single database is searched, your systematic review question must be structured. The PICO (or PICOS) framework transforms a broad topic into a focused, searchable, answerable research question β the foundation on which every subsequent methodological decision rests.
Population
The patient, person, or group of interest. Must be defined with sufficient precision to guide inclusion/exclusion criteria.
e.g., “Adults aged 18β65 with type 2 diabetes”Intervention
The treatment, programme, exposure, or factor being examined. Includes dosage, frequency, and mode of delivery where relevant.
e.g., “Mindfulness-based cognitive therapy (MBCT)”Comparison
The comparator or control condition. May be another active intervention, usual care, a placebo, or no intervention.
e.g., “Treatment-as-usual or waiting list control”Outcome
The primary and secondary outcomes of interest. Must be pre-specified. Distinguish primary outcomes (review question) from secondary outcomes.
e.g., “Depression severity measured by PHQ-9 or BDI-II”Study Design
The types of study designs eligible for inclusion. In the PICOS extension, specifying eligible study designs upfront strengthens methodological rigour.
e.g., “Randomised controlled trials only” or “All quantitative designs”Why PICO matters beyond question-framing: Your PICO framework directly determines your database search strategy. Each PICO element generates a set of keywords and subject headings (MeSH terms for PubMed, EMTREE for EMBASE) that are combined using Boolean operators (AND between PICO elements; OR between synonyms within each element) to construct the search string. A poorly defined PICO produces either a search strategy with unacceptable specificity (missing relevant studies) or unacceptable sensitivity (retrieving thousands of irrelevant records). Getting the PICO right before searching is one of the highest-leverage decisions in the entire systematic review process.
PICO Variants for Non-Clinical Research Questions
The original PICO framework was developed for clinical intervention questions β comparing one treatment against another in a defined patient population. Many systematic reviews, however, address different types of research questions for which PICO extensions or alternatives are more appropriate. For qualitative systematic reviews exploring experiences or perceptions, the SPIDER framework (Sample, Phenomenon of Interest, Design, Evaluation, Research type) is often more suitable. For diagnostic accuracy reviews, PIRD (Population, Index test, Reference test, Diagnosis of interest) provides the right structure. For prevalence reviews, PECO (Population, Exposure, Comparator, Outcome) is used. For scoping reviews, PCC (Population, Concept, Context) frames the question more broadly.
We work with you to identify the most appropriate question framework for your specific research area before developing the protocol. A clinical question about treatment efficacy is structured differently from a social science question about service users’ experiences, which is structured differently again from an epidemiological question about disease prevalence. The methodological decisions that follow from the question framework β which databases to search, which quality appraisal tool to apply, which synthesis method to use β all depend on getting the question structure right from the beginning. Our research paper writing service also handles standalone elements of this research design work.
Database Search Strategy: Where and How We Search
A systematic review is only as comprehensive as its search strategy. We search the databases that carry the evidence for your specific research question β including grey literature β and document every search string in full for PRISMA reporting.
- PubMed / MEDLINECore
- EMBASE β broader European & pharmaceutical coverageCore
- Cochrane Central Register (CENTRAL)Core
- CINAHL β nursing & allied health literatureCore
- PsycINFO β psychology & mental healthSupplementary
- Web of Science β cross-disciplinary citation indexSupplementary
- Scopus β broad scientific and social science coverageSupplementary
- WHO ICTRP β trial registries for grey literatureGrey Lit
- ClinicalTrials.govGrey Lit
- Scopus β primary cross-disciplinary indexCore
- Web of Science β Social Sciences Citation IndexCore
- ERIC β education research literatureCore
- PsycINFO β psychology, social work, counsellingCore
- Social Policy & PracticeSupplementary
- ASSIA β applied social sciencesSupplementary
- ProQuest Dissertations & ThesesGrey Lit
- SSRN β preprint and working paper repositoryGrey Lit
- OpenGrey β European grey literatureGrey Lit
- Business Source Complete (EBSCO)Core
- ABI/INFORM (ProQuest)Core
- EconLit β economics literatureCore
- Scopus & Web of ScienceSupplementary
- Emerald Insight β management & HR researchSupplementary
- SSRN & NBER Working PapersGrey Lit
- ScopusCore
- Web of Science β Science Citation IndexCore
- INSPEC β engineering & physicsCore
- GreenFILE β environmental studiesSupplementary
- Engineering Village (COMPENDEX)Supplementary
- EPA / UNEP grey literature repositoriesGrey Lit
Constructing the Search String: Boolean Logic and Subject Headings
The search string is the operational heart of the systematic review methodology. It translates your PICO elements into database-executable queries using Boolean operators (AND, OR, NOT), wildcards and truncation (*), phrase searching (” “), and controlled vocabulary subject headings (MeSH terms for MEDLINE/PubMed; EMTREE terms for EMBASE). A well-constructed search string is simultaneously sensitive enough to retrieve all relevant studies and specific enough to avoid retrieving an unmanageable number of irrelevant results.
The sensitivityβspecificity trade-off in search design is one of the most technically demanding aspects of systematic review methodology. An overly sensitive search may return 15,000 records, of which 25 are eventually included β requiring screening of 14,975 irrelevant records. An overly specific search may return 400 records with only 20 included β but may have missed 10 relevant studies that used different terminology. We balance this trade-off based on your question type, your available time, and the sensitivity expectations of your target journal or institution. Full search strings in platform-specific syntax (MEDLINE via Ovid, PubMed, EMBASE via Ovid, CINAHL via EBSCO) are documented in the appendices of the final manuscript and available as supplementary materials for peer review.
How We Synthesise the Evidence: From Data to Conclusions
Once included studies have been identified and data extracted, the synthesis is the intellectual core of the systematic review β the process by which individual study findings are combined to produce a conclusion about the state of evidence on your question. The synthesis method is not a free choice; it is determined by the nature of your research question, the types of studies included, the homogeneity of outcomes measured, and the quantity and quality of available evidence.
The primary distinction is between quantitative synthesis (meta-analysis), which statistically pools numerical data from multiple studies to produce a combined effect estimate, and qualitative synthesis (narrative synthesis, thematic synthesis, meta-ethnography), which synthesises findings from studies whose data cannot be meaningfully pooled statistically. Between these lie mixed-methods synthesis approaches that integrate both types of evidence. Choosing the wrong synthesis method β conducting a meta-analysis when the included studies are too heterogeneous to pool validly, for example β is a fundamental methodological error that invalidates the review’s conclusions.
According to the Cochrane Handbook for Systematic Reviews of Interventions, “if it is not possible or appropriate to meta-analyse the data, a narrative synthesis should be conducted.” This is not a fallback β a rigorous narrative synthesis using structured approaches (vote counting with effect direction, harvest plots, albatross plots, textual descriptions following the Synthesis Without Meta-analysis [SWiM] guidelines) is a valid and increasingly sophisticated synthesis method in its own right.
We determine the appropriate synthesis approach based on your included studies after screening and data extraction, and document the rationale for the chosen method in the methods section of the manuscript in line with PRISMA 2020 requirements.
Synthesis Methods We Apply
Meta-Analysis
QuantitativeNarrative Synthesis
QualitativeThematic Synthesis
QualitativeMeta-Ethnography
QualitativeFramework Synthesis
Mixed MethodsRealist Synthesis
Mixed MethodsRisk-of-Bias Assessment: Evaluating the Quality of Your Included Studies
Every included study in a systematic review must be critically appraised for methodological quality. This is not optional β PRISMA 2020 requires risk-of-bias assessment, and journals will reject reviews that omit it. The tool used depends on the study design.
| Risk-of-Bias Tool | Study Designs Assessed | Domains Evaluated | Recommended By | Scope |
|---|---|---|---|---|
| Cochrane RoB 2 | Randomised controlled trials (parallel, cross-over, cluster) | Randomisation process; deviations from intended interventions; missing outcome data; outcome measurement; selection of reported result | Cochrane; most clinical journals | Gold Standard |
| ROBINS-I | Non-randomised studies of interventions (cohort, case-control, before-after) | Confounding; selection of participants; classification of interventions; deviations from interventions; missing data; measurement of outcomes; selection of reported result | Cochrane; NICE; WHO | Gold Standard |
| CASP Tools | RCTs, cohort, case-control, qualitative, diagnostic, economic evaluation (separate tools per design) | 10β12 structured questions assessing validity, results, and relevance for each study design | CASP UK; widely used in social science, nursing, public health | Widely Applied |
| JBI Critical Appraisal Tools | RCTs, quasi-experimental, cohort, prevalence, case reports, qualitative, text & opinion (design-specific checklists) | Structured checklists assessing methodological appropriateness, validity, and reliability for each study type | Joanna Briggs Institute; widely used in nursing, health, and allied health | Widely Applied |
| QUADAS-2 | Diagnostic accuracy studies | Patient selection; index test; reference standard; flow and timing of test comparisons | Cochrane DTA; systematic reviews of diagnostic tests | Gold Standard |
| GRADE-CERQual | Qualitative evidence syntheses | Methodological limitations; coherence; adequacy of data; relevance | WHO; qualitative evidence synthesis reviews | Qual Synthesis |
| Newcastle-Ottawa Scale | Observational studies (cohort, case-control) in non-Cochrane contexts | Selection of study groups; comparability of groups; ascertainment of outcome/exposure | Commonly used in non-Cochrane health and social science systematic reviews | Observational |
Dual independent assessment: Best practice in systematic review methodology requires that risk-of-bias assessments are conducted independently by two reviewers, with disagreements resolved by consensus or a third assessor. We document the assessment process and inter-rater agreement in the methods section, and provide the completed risk-of-bias assessment matrices for all included studies as supplementary files β a requirement of most systematic review journals.
Six Things That Separate a Good Systematic Review from a Publishable One
These are the components where most student and early-career researcher systematic reviews fall short β and where our methodological expertise makes the decisive difference.
Sensitive, Documented Search Strings
We construct search strings in platform-specific syntax for each database, including MeSH terms, EMTREE terms, free-text synonyms, truncation, and Boolean logic. Full search strings are appended to the manuscript exactly as required by PRISMA 2020 and journal supplementary materials requirements. A search string that “looks reasonable” is not sufficient β it must be reproducible and demonstrably exhaustive for your question.
Dual-Screened Study Selection
Title/abstract and full-text screening should be conducted independently by two reviewers with disagreements resolved by discussion or adjudication. We document the screening process with the tools used (RAYYAN, Covidence, or Rayyan-compatible formats), report kappa or percentage agreement statistics, and list excluded full-text studies with reasons β a PRISMA 2020 requirement that many reviews fail to meet.
Structured Data Extraction
Data extraction is conducted using a pre-piloted data extraction form that captures all information relevant to your research question and synthesis: study design, population characteristics, intervention details, comparator, outcomes measured and instruments used, results with effect sizes and confidence intervals, and methodological quality judgements. Extraction forms are available as supplementary materials.
Heterogeneity Assessment & Subgroup Analysis
When meta-analysis is conducted, heterogeneity is formally assessed using IΒ² statistics and Cochran’s Q test, with clinical heterogeneity explored through pre-specified subgroup analyses and meta-regression where sufficient data exist. We document and report the reasons for heterogeneity, discuss its implications for the interpretation of pooled estimates, and apply appropriate fixed-effects or random-effects models with justification. See our statistics service for standalone meta-analysis support.
Publication Bias Assessment
Publication bias β the tendency for positive or statistically significant results to be published more frequently than null or negative results β is a threat to the validity of any systematic review with quantitative synthesis. We assess publication bias using funnel plots, Egger’s test, Begg’s test, and trim-and-fill analysis where 10 or more studies contribute to a meta-analysis, and discuss the likelihood and potential impact of publication bias in the discussion.
GRADE Certainty of Evidence
GRADE summary-of-findings tables provide peer reviewers and readers with a transparent assessment of how confident we can be in each synthesised outcome estimate. We produce GRADE tables for all primary and secondary outcomes, document the GRADE judgements for each of the five domains (risk of bias, inconsistency, indirectness, imprecision, publication bias), and translate the GRADE certainty rating into a clear implication statement for each outcome.
Types of Evidence Synthesis Reviews We Support
Not every evidence synthesis question calls for a full systematic review. We support the full spectrum of review types β helping you choose the right methodology for your question and delivering it to the standard that type requires.
Systematic Review
Pre-specified protocol, comprehensive database search, dual screening, quality appraisal, and explicit synthesis of all available evidence on a focused research question. PRISMA 2020 compliant. Suitable for journal publication and doctoral theses.
Typical timeline: 8β16 weeks full review
Systematic Review with Meta-Analysis
Combines the rigour of a full systematic review with statistical pooling of quantitative results. Produces combined effect estimates with confidence intervals, forest plots, heterogeneity statistics, and publication bias assessments. Highest level of quantitative evidence synthesis.
Tools: RevMan, R, Stata
Qualitative Systematic Review
Systematically synthesises findings from primary qualitative studies to address questions about experiences, perceptions, meanings, and processes. Uses thematic synthesis, meta-ethnography, or meta-aggregation. ENTREQ reporting guidelines applied alongside PRISMA.
Synthesis: Thematic synthesis, meta-ethnography
Scoping Review
Maps the extent, range, and nature of evidence on a topic without quality appraisal of included studies. Used to identify research gaps, examine how research has been conducted, and inform the design of a full systematic review. PRISMA-ScR reporting checklist applied. Typically broader inclusion criteria than a systematic review.
Reporting: PRISMA-ScR checklist
Rapid Reviews
A rapid review applies a streamlined version of systematic review methodology to produce timely evidence synthesis, usually within 2β8 weeks rather than the 6β12 months of a full systematic review. Systematic shortcuts β restricting the search to fewer databases, single rather than dual screening, limiting to English-language studies β are explicitly documented and acknowledged as limitations. Rapid reviews are increasingly used to inform time-sensitive policy decisions and are now published in peer-reviewed journals with appropriate caveats. We produce rapid reviews to the Cochrane Rapid Reviews Methods Group guidance and the WHO rapid review standards.
Umbrella Reviews (Reviews of Reviews)
An umbrella review (or overview of systematic reviews) synthesises evidence from multiple existing systematic reviews rather than primary studies. The inclusion unit is the systematic review itself. Used when multiple systematic reviews exist on related aspects of a topic and a higher-level synthesis is needed to produce actionable conclusions. Applied to assess the evidence base for complex interventions with multiple systematic reviews addressing different populations, settings, or outcome types. PRISMA reporting applies with adaptations for the umbrella review design.
Disciplines We Cover for Systematic Review Support
Systematic review methodology varies significantly by discipline β the databases searched, the quality appraisal tools applied, the synthesis methods used, and the reporting standards expected all differ. Our writers are matched to your specific disciplinary context.
Our Systematic Review Process: From Brief to Manuscript
Every systematic review we produce follows a documented, staged process. You are involved at every stage β approving the protocol before searching, reviewing the screening decisions, and approving the synthesis framing before manuscript production.
Research Question Scoping & PICO Development
We begin by working with you to define a focused, answerable research question structured according to the appropriate framework (PICO, PICOS, SPIDER, PIRD, or PCC) for your question type. A vague question produces an unmanageable search strategy and a review that cannot produce actionable conclusions. We review your initial question, propose refinements to improve specificity and searchability, and confirm the PICO with you before developing the protocol.
At this stage we also identify the most appropriate review type for your question (full systematic review, scoping review, rapid review, umbrella review) and confirm the databases to be searched based on your discipline, question, and institutional database access.
Protocol Development & Registration
The protocol is the pre-specified plan for the entire review β the methodological commitment that distinguishes a systematic review from an ad hoc literature survey. We develop a full protocol covering: rationale and objectives; eligibility criteria for studies (population, intervention, comparator, outcomes, study designs); information sources and database selection; search strategy with full Boolean strings; study selection procedure; data collection and extraction process; quality appraisal tools; and synthesis plan.
For reviews intended for PROSPERO registration, we prepare the PROSPERO submission form and assist with the registration process. PROSPERO registration provides a public record of the protocol that precedes the search β the highest transparency mechanism in systematic review methodology and increasingly required by journals. For dissertations where PROSPERO registration is not required, the protocol is documented in the methods section at the level of detail your institution requires.
Comprehensive Database Searching
We execute the database searches using the platform-specific syntax for each database (MEDLINE via Ovid, EMBASE via Ovid, PubMed, CINAHL via EBSCO, PsycINFO via ProQuest, Scopus, Web of Science, and discipline-specific databases as appropriate). Each search string is developed from the PICO framework, incorporating controlled vocabulary subject headings alongside free-text synonyms, with appropriate field codes, truncation, and proximity operators.
Grey literature searches are conducted in parallel β including clinical trial registries (ClinicalTrials.gov, WHO ICTRP), conference proceedings, government and organisational reports, and ProQuest Dissertations and Theses. Citation chasing (forward and backward citation searching of included studies) is conducted after the initial database searches to capture studies not indexed in searched databases. All searches are dated and documented in full β the complete search strings in platform-specific syntax are appended to the manuscript as required by PRISMA 2020.
Title/Abstract Screening & Full-Text Screening
Screening proceeds in two stages. In the first stage, titles and abstracts of all retrieved records are screened independently against the inclusion/exclusion criteria. Records that clearly do not meet inclusion criteria are excluded; records that potentially meet criteria or where there is uncertainty are retained for full-text review. In the second stage, full-text articles are retrieved for all records passing the first stage and assessed against the criteria in detail.
Both screening stages should be conducted independently by two reviewers with disagreements resolved by discussion or third-party adjudication β we document the inter-rater reliability (kappa statistic or percentage agreement) and resolution process. All records excluded at full-text stage are documented with the reason for exclusion for each record β this list is a PRISMA 2020 requirement and must be available as supplementary material for journal submission.
Data Extraction
A structured data extraction form is developed from the protocol and piloted on a sample of included studies before full extraction. The form captures all information relevant to the synthesis: bibliographic details; study design; country and setting; population characteristics (including sample size, age, gender, clinical characteristics); intervention details (type, dose, frequency, duration, delivery mode); comparator details; outcome measures and instruments; results with effect sizes, confidence intervals, and p-values; funding sources; and any data required for subgroup analyses.
Extraction is conducted by one reviewer and checked by a second, with discrepancies resolved by discussion. Where original study data are insufficient for meta-analysis (missing standard deviations, unclear randomisation unit, outcomes reported only graphically), we contact study authors for additional data and document the contact and response.
Risk-of-Bias Assessment & Quality Appraisal
Every included study is assessed for methodological quality using the tool appropriate to its study design β Cochrane RoB 2 for RCTs, ROBINS-I for non-randomised intervention studies, QUADAS-2 for diagnostic accuracy studies, CASP or JBI tools for qualitative studies, the Newcastle-Ottawa Scale for observational studies in non-Cochrane contexts. All assessments are conducted independently by two reviewers with disagreements resolved by consensus or adjudication.
Risk-of-bias results are presented in risk-of-bias summary figures (traffic light tables for Cochrane RoB 2; proportion bar charts; summary figures) and discussed narratively. The implications of risk-of-bias findings for the certainty of the evidence are integrated into the synthesis and GRADE assessments.
Synthesis & PRISMA Flow Diagram
The synthesis is conducted using the method specified in the protocol β meta-analysis, narrative synthesis, thematic synthesis, meta-ethnography, or framework synthesis β with the rationale for the chosen approach documented. For meta-analysis, statistical analysis is conducted in RevMan 5, R, or Stata, producing forest plots, heterogeneity statistics, funnel plots, and sensitivity analyses. For narrative synthesis, the SWiM reporting guidelines are followed. For qualitative synthesis, the ENTREQ reporting guidelines are applied alongside PRISMA.
The PRISMA 2020 flow diagram is produced in the updated format, distinguishing database and other source records, and accurately reflecting all screening decisions with precise numbers. The flow diagram is produced as an editable figure in your required format.
Full Manuscript Write-Up
The final systematic review manuscript is written to PRISMA 2020 reporting standards, covering all 27 reporting items across title/abstract, introduction, methods, results, discussion, and other information sections. The manuscript is calibrated to your target β whether that is a specific peer-reviewed journal (with house style, word limit, and structured abstract requirements applied), a doctoral dissertation (with your institution’s formatting requirements), or a Master’s thesis chapter. All citations are formatted in your required style (APA 7, Vancouver, Harvard, Chicago). The manuscript is delivered with a Turnitin originality report and one revision round included.
Systematic Review Writing Service Pricing
Systematic reviews are priced differently from standard essay writing because of the methodological complexity and time investment involved. The widget at the right of your screen provides a live estimate.
Individual Components
- Search strategy & full search strings
- PRISMA flow diagram (stand-alone)
- Data extraction tables
- Risk-of-bias assessment (one tool)
- Methods section write-up
- Results section write-up
- Narrative synthesis chapter
Full Systematic Review
- PICO framework development
- Full protocol documentation
- Multi-database search (15+ databases)
- Dual screening & documentation
- Structured data extraction
- Risk-of-bias assessment (validated tools)
- Synthesis (narrative or meta-analysis)
- PRISMA 2020 flow diagram
- Full PRISMA-compliant manuscript
- Turnitin report + one revision
Systematic Review + Meta-Analysis
- Everything in Full Systematic Review
- RevMan / R meta-analysis execution
- Forest plots & funnel plots
- Heterogeneity assessment (IΒ², Q test)
- Subgroup & sensitivity analyses
- Publication bias assessment
- GRADE summary-of-findings tables
- Journal-submission-ready manuscript
Pricing note: Systematic review pricing reflects the complexity of the methodology, not just the word count of the final manuscript. A full systematic review with comprehensive database searching, dual screening of 3,000+ records, risk-of-bias assessment, and narrative synthesis may produce a 12,000-word manuscript β but the work involved is substantially greater than a 12,000-word essay. We provide a detailed project-specific quote at order placement based on your question complexity, database access requirements, expected volume of retrieved records, and synthesis method.
What Researchers and Students Say
“My doctoral systematic review had already been through two supervisor revisions and was still being returned with the same feedback: the risk-of-bias assessment was not being applied consistently, and the GRADE certainty ratings were not justified. I had read the Cochrane Handbook twice but still wasn’t confident in my application of RoB 2 and ROBINS-I to the mixed study types in my included evidence base. The writer who worked on my risk-of-bias chapter clearly understood the tools at a level I hadn’t reached β not just the mechanics of filling in the domains but the conceptual basis for the judgements. They produced a fully documented, domain-by-domain assessment for all 24 included studies with a clear rationale for each high/low/some-concerns judgement. My supervisor accepted the chapter at the next submission. The GRADE tables were also the best I’ve seen outside a published Cochrane review.”
“The search strategy they developed was far more sophisticated than anything I could have produced β using EMTREE thesaurus terms in EMBASE alongside MeSH in MEDLINE, with carefully constructed Boolean strings that retrieved 4,200 records from which 31 studies were eventually included. My previous attempts at search strategy construction had either retrieved 40,000 records or missed major papers. The documented search strings in platform-specific Ovid syntax passed peer review at Systematic Reviews (BioMed Central) without a single query about the search methodology.”
“I needed a thematic synthesis for a qualitative systematic review on the experiences of family carers of people with dementia β a qualitative systematic review, not a meta-analysis, which many services either don’t understand or don’t handle well. The writer used Thomas and Harden’s thematic synthesis framework correctly, produced genuinely analytical third-order themes (not just descriptions of what the first-order findings said), and applied GRADE-CERQual to assess the certainty of each synthesised finding. The ENTREQ reporting checklist was completed correctly. My MSc dissertation examiner specifically praised the synthesis methodology.”
“The meta-analysis was the component I was most uncertain about commissioning externally β getting the statistical analysis right was non-negotiable for journal submission. They used R with the metafor and meta packages, conducted both fixed-effects and random-effects analyses with the REML estimator, reported IΒ² and ΟΒ² with 95% confidence intervals, and produced publication-standard forest plots. The heterogeneity was substantial (IΒ²=71%) and they correctly applied prediction intervals and conducted a subgroup analysis by intervention type that explained most of the heterogeneity. The paper was accepted by the Journal of Psychiatric Research.”
“My scoping review for a Master’s in Education needed to follow the Arksey and O’Malley framework and report using PRISMA-ScR. The writer knew both the framework and the checklist, produced a clean PRISMA-ScR-compliant methods section, and delivered a structured evidence map charting study characteristics across five dimensions. My supervisor commented it was ‘one of the clearest scoping review methodologies he had seen from a taught Master’s student.'”
Frequently Asked Questions About Our Systematic Review Writing Service
What is the difference between a systematic review and a literature review? +
Do I need to register my systematic review protocol with PROSPERO? +
Can you conduct the actual database searches, or do I need to do them myself? +
Can you help with a systematic review chapter within a doctoral thesis? +
What if the number of studies retrieved requires screening thousands of records? +
Can you help if I have already completed the search and screening and only need the write-up? +
Is the systematic review we produce original and confidential? +
Can you produce the PRISMA flow diagram as a submission-ready graphic? +
Do you help with rapid reviews that need to be completed quickly? +
Related Services Systematic Review Clients Use
Literature Review Writing
Narrative literature reviews, integrative reviews, and critical literature surveys β the foundational evidence synthesis before a systematic review.
Explore βDissertation & Thesis Writing
Full doctoral and Master’s dissertation support including systematic review chapters, methodology, results, and discussion.
Explore βStatistics & Data Analysis
Meta-analysis execution in R, RevMan, or Stata; statistical interpretation and results write-up for quantitative systematic reviews.
Explore βResearch Paper Writing
Standalone research papers, empirical studies, and publication-level manuscripts across all academic disciplines.
Explore βEditing & Proofreading
Professional review of completed systematic review manuscripts for clarity, PRISMA compliance, and academic quality.
Explore βPhD Dissertation Services
Doctoral-level support including systematic review methodology chapters, theoretical frameworks, and thesis write-up.
Explore βNursing Assignment Help
Clinical systematic reviews and evidence-based practice papers for nursing, midwifery, and allied health programmes.
Explore βPsychology Writing Help
Psychology systematic reviews, meta-analyses, and evidence synthesis for clinical, developmental, and social psychology.
Explore βA Systematic Review Is
Evidence Done Properly.
PRISMA-compliant. Protocol-registered. Comprehensively searched. Rigorously appraised. Expertly synthesised. Whether you need a complete review from protocol to manuscript, or expert support with a specific component β we deliver to the standard that publication and doctoral assessment require.
PRISMA 2020 Compliant Β· NDA Protected Β· Original Β· Turnitin Report Included Β· Free Revision