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PRISMA 2020 · PICOS · 2026 Guide

Systematic Review — PRISMA 2020 format & PICOS

The focused question, eligibility, search strategy, PRISMA flow, risk of bias and synthesis — exactly how a systematic review is structured and reported.

Updated June 2026·9-min read·By LivoDraft
Quick answer

A systematic review answers a focused PICOS question by systematically searching, screening and synthesising all relevant studies using a pre-defined protocol, reported per PRISMA 2020. Structure: Abstract → Introduction & PICOS → Methods (eligibility, search, selection, risk of bias) → Results (PRISMA flow + synthesis) → Discussion → Conclusion. It is more rigorous and reproducible than a narrative review.

Overview

What is a systematic review?

A systematic review answers one focused question by finding, appraising and synthesising all the relevant evidence using a transparent, pre-registered protocol. Unlike a narrative literature review, every step — search, screening, inclusion, quality assessment — is documented so the review can be reproduced.

The question

The PICOS framework

P — PopulationI — InterventionC — ComparisonO — OutcomeS — Study design

PICOS turns a topic into a precise, answerable question and defines exactly which studies are eligible.

Structure

The PRISMA structure

  1. AbstractOften structured: Background, Methods, Results, Conclusions.
  2. Introduction & PICOSRationale and the focused question.
  3. MethodsEligibility, search strategy, selection, data extraction, risk of bias.
  4. ResultsPRISMA flow diagram, study characteristics, synthesis / meta-analysis.
  5. DiscussionInterpretation, limitations, certainty of evidence.
  6. ConclusionImplications for practice and research.
Reporting

The PRISMA flow diagram

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PRISMA 2020 requires a flow diagram showing records identified → screened → excluded → included, with numbers at each stage. LivoDraft drafts the methods and results around this flow and a structured abstract.

Distinction

Systematic vs literature review

A literature review is a thematic, narrative survey. A systematic review follows a pre-defined protocol, searches exhaustively, appraises study quality, and reports per PRISMA — so it is reproducible and used for evidence synthesis (often registered on PROSPERO).

Draft a PRISMA-structured systematic review

LivoDraft frames the PICOS question, drafts the methods around eligibility/search/selection/risk-of-bias, structures results around the PRISMA flow, and cites real DOI-verified studies.

Draft my review  →See pricing
FAQ

Systematic review FAQ

What is a systematic review?+
A review that answers a focused question by systematically searching, screening and synthesising all relevant studies using a pre-defined protocol, reported per PRISMA 2020 — more rigorous and reproducible than a narrative review.
What is PICOS?+
Population, Intervention, Comparison, Outcome, Study design — the framework that defines the question and which studies are eligible.
What is PRISMA 2020?+
The reporting standard — a checklist and a flow diagram documenting how studies were identified, screened and included, for transparency and reproducibility.