How to Write a Systematic Literature Review in Nursing

In nursing research, "systematic review" names a specific method, not just a thorough literature review. It has a pre-set protocol, explicit criteria, formal appraisal and its own reporting standard.

This guide explains how a systematic review differs from a narrative review, walks through the protocol and the PRISMA 2020 flow, covers appraisal tools, and helps you decide whether your assignment really asks for one.

Systematic Versus Narrative Review

A narrative review, the kind most capstone Chapter 2s use, synthesizes research around a topic by theme. The reviewer uses judgment to choose studies that inform the argument.

A systematic review is a research method in its own right. Its decisions are documented before searching so that another researcher could repeat the search and reach the same set of studies.

The practical point: a systematic review is a different kind of document with its own methods section, not a longer version of a background chapter.

Core Steps in a Systematic Review Protocol

The protocol is written before you search. Changing criteria after you have read the studies introduces exactly the selection bias the method is designed to prevent.

1. Define a focused question, usually with PICOT or PICo for qualitative questions.
2. Set inclusion and exclusion criteria: population, intervention or exposure, comparison, outcomes, study designs, dates and language.
3. Name the databases and write the exact search strings.
4. Run the searches, record results per database and remove duplicates.
5. Screen titles and abstracts against the criteria and record exclusions.
6. Retrieve full texts, apply the criteria again and record each exclusion reason.
7. Appraise each included study with a tool matched to its design.
8. Extract data into a standard table and synthesize the findings.

Building the Search Strategy

Most nursing reviews search at least two or three databases. CINAHL and PubMed/MEDLINE are the usual core, with the Cochrane Library added for intervention questions and PsycINFO for mental health topics.

Combine subject headings (CINAHL Headings, MeSH) with keywords and synonyms. Join synonyms with OR and concepts with AND, then record the final string for each database exactly as run.

Test the string before committing. A search that returns thousands of records may be too broad to screen; one that returns a handful may be missing synonyms.

The PRISMA 2020 Flow Diagram

PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) was updated in 2020. Its flow diagram tracks records through three main stages.

Older guides describe a separate eligibility stage from the 2009 version. PRISMA 2020 folds full-text assessment into screening, so use the current template unless your course specifies otherwise.

The diagram is also a planning tool. If 800 records shrink to four included studies, your terms or criteria may need adjusting before you spend hours on full texts.

Quality Appraisal with CASP and JBI

Formal appraisal of every included study is a defining feature of a systematic review. Many nursing programs introduce it through two families of checklists.

• CASP (Critical Appraisal Skills Program): design-specific checklists for randomized trials, cohort studies, qualitative studies and systematic reviews, asking whether the question was focused, methods appropriate, bias addressed and results applicable.
• JBI (Joanna Briggs Institute): design-specific tools widely used in nursing and allied health reviews.

Match the tool to each study's design; an RCT checklist does not fit a qualitative study. Present the results in a table showing how each study met each criterion.

Then use the appraisal. A weaker study can still be included when evidence is limited, but your synthesis should give it less weight and say so openly.

Synthesizing the Findings

Extract the same data from every study: author and year, design, sample and setting, intervention, outcomes, key findings and appraisal result. A consistent extraction table makes the synthesis much easier to write.

Most student reviews use narrative synthesis, grouping findings by outcome or theme and comparing direction and strength of effect. A meta-analysis pools results statistically and only makes sense when studies are similar enough in design, population and measures.

Qualitative reviews use approaches such as thematic synthesis. Whatever the method, end with what the body of evidence supports, its limits, and what it means for practice.

Does Your Assignment Need a True Systematic Review?

Doing a full systematic review when a narrative review was expected wastes weeks. Submitting a narrative review when a systematic one was required misses large parts of the rubric.

Signals that a true systematic review is expected:

• The prompt mentions PRISMA, a flow diagram or formal quality appraisal.
• The course focuses on research methods or evidence synthesis.
• The review is a standalone deliverable rather than one chapter among several.
• Your program treats "systematic review" and "literature review" as separate assignments with separate rubrics.

If "systematic" is used loosely to mean thorough, a well-organized narrative review is usually right; our nursing literature review guide covers that format. When in doubt, ask your instructor whether PRISMA reporting and formal appraisal are expected.

Common Systematic Review Mistakes

These problems are flagged quickly by markers who know the method. Most come from treating the review as an ordinary literature search.

• Calling a review systematic without PRISMA reporting or formal appraisal.
• Setting criteria after reading the studies instead of before searching.
• A missing PRISMA diagram, or numbers that do not add up between stages.
• Searching only Google Scholar when the protocol names several databases.
• Using an appraisal tool that does not match the study design.
• Appraisal scores in a table that never affect the synthesis or conclusions.
• Search terms so narrow that almost nothing returns, or so broad that screening is impossible.

How NurseCapstone Helps with Systematic Reviews

Send your assignment prompt, your question and any required databases or appraisal tools. A writer matched to your level confirms whether the brief calls for a systematic or narrative review, then drafts a model with a documented protocol, search log, PRISMA 2020 flow, appraisal tables and synthesis.

The model is built on real, verifiable sources and never invented data. Use it to guide your own review, with free revisions within the scope of your original request.