The essential foundation
Understanding this project
A nursing systematic review is a research method in its own right. It requires a predefined question, reproducible search, transparent eligibility criteria, structured screening, appraisal and synthesis. The methods need to be explicit enough for another researcher to follow.
A strong nursing systematic review begins long before the first database search. The review question determines which evidence is relevant, which designs can answer it and how the results may be interpreted. For nurses balancing practice and doctoral study, it is tempting to start collecting articles immediately. That can create a large library of papers without a reproducible review method. We help researchers understand the decisions that need to be made before searching and document those decisions in a form that can be explained to a supervisor or review committee.
A decision specific to this project
Protocol audit
A reproducible review needs eligibility criteria written before study selection, a searchable database strategy and a record of excluded full texts.
What to prepare
A question framework, inclusion table, draft search strings and a plan for documenting selection.
Methodological boundary: A PRISMA diagram reports decisions already made; it does not establish that screening was unbiased.
Where difficulties begin
Making a Review Protocol Reproducible
My review question is still too broad.
The database search retrieves too much irrelevant literature.
I am unsure how to structure screening and extraction.
I do not know which appraisal tool is appropriate.
I need to make the methods and PRISMA reporting reproducible.
A practical approach
From Review Question to Transparent Evidence Synthesis
Clarify the population, setting, phenomenon or intervention and the outcome of interest. PICO is useful for intervention effectiveness questions, but other frameworks may fit qualitative or diagnostic questions better. Eligibility criteria should follow the question rather than be invented after the search. Translate concepts into controlled vocabulary and free text terms. Compare database coverage, use Boolean logic deliberately and record dates, search strings and limits. PubMed and CINAHL often contribute different perspectives, so the database choice should be justified.
Define a question that can be answered
Clarify the population, setting, phenomenon or intervention and the outcome of interest. PICO is useful for intervention effectiveness questions, but other frameworks may fit qualitative or diagnostic questions better. Eligibility criteria should follow the question rather than be invented after the search.
Plan a reproducible search
Translate concepts into controlled vocabulary and free text terms. Compare database coverage, use Boolean logic deliberately and record dates, search strings and limits. PubMed and CINAHL often contribute different perspectives, so the database choice should be justified.
Screen and appraise transparently
Decide how titles, abstracts and full texts will be screened. Record reasons for full text exclusions and select appraisal instruments appropriate to the included study designs. A PRISMA flow diagram describes selection, but does not substitute for a sound selection process.
Choose a defensible synthesis
Examine clinical and methodological differences before pooling results. A narrative synthesis may be more appropriate when measures, populations or interventions are too heterogeneous for a meaningful meta analysis. Report uncertainty rather than forcing a definitive conclusion.
Putting the ideas into context
A Fall-Prevention Review in Practice
A nurse studying interventions to reduce inpatient falls might begin with a broad interest in fall prevention. The question must then specify the setting, population, interventions and outcomes before an eligibility protocol and database search can be justified. If studies measure falls differently or use substantially different designs, the synthesis strategy must account for those differences.
Illustrative example only; check your programme requirements, actual evidence and any necessary permissions.
What support looks like for this topic
How we support your research
PICO & Protocol
Refine the review question, eligibility criteria, outcomes and protocol before searching begins.
Database Search Strategy
Develop search concepts and database-specific strategies for sources such as CINAHL and PubMed.
Screening
Structure title, abstract and full-text screening around clear inclusion and exclusion criteria.
Data Extraction
Build extraction fields that capture the information required to answer the review question.
Critical Appraisal
Apply study-design-appropriate appraisal or risk-of-bias tools.
Synthesis & PRISMA Reporting
Present the study selection, findings and review limitations transparently.
Good research practice
A practical note for this stage
We can talk through a search strategy, screening decisions and the evidence behind your review. Bringing your search notes or protocol helps us make the discussion specific.
Explore the subject further
Related specialist areas
Focused guidance for the next decision in your research.
Question formulation, protocol, searching, screening, appraisal, synthesis and PRISMA reporting.
Map the breadth of evidence, concepts, study characteristics and research gaps.
Effect sizes, pooling, heterogeneity, sensitivity analysis, forest plots and interpretation.
PICO concepts, keywords, controlled vocabulary and searches across CINAHL, PubMed and other databases.
Eligibility criteria, title/abstract screening, full-text decisions and structured extraction.
JBI, CASP, RoB 2 and other design-appropriate appraisal approaches.
Questions researchers ask
Frequently asked questions
Can I request only one stage of a review?
Yes. The architecture supports modular requests such as search strategy, screening, data extraction, appraisal, synthesis or manuscript support.
Do all systematic reviews need a meta-analysis?
No. Meta-analysis is appropriate only when the included studies are sufficiently compatible and the review question supports quantitative pooling.
Can a scoping review be used instead?
Yes, when the objective is to map the breadth and characteristics of evidence rather than estimate a pooled effect.
Further reading
Research standards and reliable resources
These external resources can help you explore relevant methodological guidance. Always follow the requirements of your programme and verify the version of any standard you use.