How to Execute a High-Distinction PRISMA Systematic Literature Review in Nursing & Medicine

How to Execute a High-Distinction PRISMA Systematic Literature Review in Nursing & Medicine

Step-by-step methodology for designing PICO questions, Boolean database search syntax, screening protocols, and CASP critical appraisal tables.

Written by Dr. Sophia Chen•Doctor of Nursing Practice (King's College London)•February 2, 2026•10 min read

Key Academic Takeaways:

  • Structure your clinical research question using PICO (Population, Intervention, Comparison, Outcome).
  • Document transparent Boolean search strings across at least three major databases (PubMed, CINAHL, Cochrane).
  • Provide a complete PRISMA 2020 4-stage flow diagram (Identification, Screening, Eligibility, Included).
  • Use standardized CASP appraisal checklists to evaluate methodological quality and bias risk.

The Role of Systematic Reviews in Evidence-Based Practice

In clinical nursing and medical sciences, systematic literature syntheses represent the highest tier of the evidence pyramid. Unlike narrative reviews, a systematic review follows a pre-defined, reproducible protocol adhering to PRISMA 2020 guidelines.

Step 1: PICO Question Formulation

  • P (Population): Adult patients presenting with acute sepsis in emergency triage.
  • I (Intervention): Implementation of NEWS2 scoring protocols.
  • C (Comparison): Standard clinical judgment / traditional early warning scores.
  • O (Outcome): Time to antimicrobial delivery, 30-day mortality rate, ICU escalation.

Step 2: Transparent Database Search Syntax

A robust search strategy combines MeSH headings and free-text keywords:

("NEWS2" OR "National Early Warning Score 2") AND ("sepsis" OR "acute physiological deterioration") AND ("emergency department" OR "acute triage")

Step 3: Critical Appraisal Using CASP

Every included randomized controlled trial (RCT) or cohort study must be systematically appraised using the Critical Appraisal Skills Programme (CASP) checklist, evaluating selection bias, blinding, and statistical power.

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Frequently Asked Questions on How to Execute a High-Distinction PRISMA Systematic Literature Review in Nursing & Medicine

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A PRISMA systematic review uses a pre-defined, reproducible protocol across multiple electronic databases, explicit inclusion/exclusion criteria, and standardized quality appraisals (CASP), whereas a narrative review is a descriptive overview without formal screening metrics.

Break down your clinical inquiry into Population (e.g. adult ICU patients with sepsis), Intervention (e.g. NEWS2 scoring protocol), Comparison (e.g. traditional early warning scores), and Outcome (e.g. time to antimicrobial delivery and 30-day mortality).

Top UK nursing and health faculties expect systematic search strings executed across at least three biomedical databases: PubMed/MEDLINE, CINAHL Complete, and the Cochrane Library (or Embase and PsycINFO where applicable).

The Critical Appraisal Skills Programme (CASP) Qualitative Checklist is the standard UK healthcare benchmark for evaluating qualitative rigour, reflexivity, and clinical credibility.

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