There are four official PRISMA 2020 flow diagram templates, not one. They vary along two axes: whether your review is new or an update, and whether you searched databases and registers only or databases, registers and other sources. Downloading the wrong one is a common and avoidable error. It leaves
PRISMA 2020 checklist with 27 items across seven sections The PRISMA checklist lists the reporting items for a systematic review. The current version, PRISMA 2020, contains 27 items organised into seven sections, and it expands to 42 rows once sub-items are counted [1]. That gap between 27 and 42 is
Covidence is one of the most widely used platforms for systematic review screening. Backed by Cochrane, it gives research teams a structured environment for title/abstract screening, full-text review, and data extraction. For many academics, it was the first dedicated tool they encountered for structured evidence synthesis. But the research
Systematic review software automates the structured, reproducible evidence synthesis process, from literature search and dual-reviewer screening to data extraction and PRISMA-compliant reporting. A traditional systematic review takes an average of 18 months of active work, and a Cochrane 2025 analysis found that only 71.9 % of 8,137 registered protocols
The PRISMA 2020 flow diagram has three phases, not four There is no official "4 steps of PRISMA". The question almost always refers to the phases of the PRISMA flow diagram, and the current version, PRISMA 2020, has three labelled phases: Identification, Screening and Included [1]. The four-phase
The PRISMA statement is a reporting guideline that tells authors what to disclose when they publish a systematic review. The current version, PRISMA 2020, is a published paper containing a 27-item checklist, a 12-item abstract checklist and a set of flow diagram templates. It governs how a review is written
Covidence and DistillerSR are two of the most established platforms for systematic review workflows, but they serve different ends of the market. Covidence is the platform most academic researchers encounter first: Cochrane-endorsed, widely adopted across over 480 institutions, and designed for teams that need reliable screening and extraction with a
PRISMA is a reporting standard in research: it defines what a finished systematic review should disclose, so readers can judge and reproduce the work. PRISMA stands for Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The current version, PRISMA 2020, is a 27-item checklist across seven sections plus a three-phase
Covidence and Rayyan are two of the most widely used platforms for systematic review screening, and research teams moving beyond spreadsheets and email chains often narrow their choice to one of these two. Both handle the core job of title and abstract screening with dual reviewers, but they approach nearly
A meta-analysis is the statistical component of a systematic review that pools the quantitative results of multiple independent studies to produce a single summary estimate. Where a systematic review identifies and appraises all relevant evidence, a meta-analysis takes the next step by combining that evidence mathematically, producing a weighted average
A systematic review follows a pre-registered protocol to identify, screen, and synthesize all available evidence on a specific research question. Unlike a narrative review, which gives the author flexibility to select and interpret sources, a systematic review documents every decision so that another researcher could repeat the same search, apply
A scoping review maps the extent, range, and nature of research activity on a topic. Unlike a systematic review that answers a narrowly focused question, a scoping review asks broader questions: What types of evidence exist? What are the key concepts? Where are the gaps? The approach was formalized by
Literature Reviews
A narrative review is a scholarly article that synthesizes the existing literature on a topic through expert interpretation rather than statistical pooling. Unlike a systematic review, which follows a pre-registered protocol with exhaustive searching and formal quality assessment, a narrative review gives the author flexibility to select, organize, and interpret
Comparisons
Rayyan and DistillerSR both offer AI-assisted systematic review screening, but they sit at opposite ends of the market. Rayyan is the accessible entry point: a freemium platform that gives individual researchers and small teams functional screening with AI prioritization at no cost. DistillerSR is the enterprise workhorse: a fully configurable
Comparisons
Paperguide and DistillerSR occupy different positions in the systematic review software market, and the choice between them depends largely on what your team needs and where it operates. Paperguide is an AI-native platform for scientific research workflows and evidence synthesis that connects AI search, systematic review, data extraction, citation-grounded writing,
Comparisons
Paperguide and Rayyan are two of the most widely used platforms for systematic review workflows in 2026, but they approach the problem from fundamentally different positions. Paperguide is an AI-native platform for scientific research workflows and evidence synthesis where AI search, literature review, systematic review, PDF analysis, structured extraction, reference
Systematic Reviews
The terms "systematic review" and "literature review" are often used interchangeably in academic conversation, but they describe two different research methodologies with different purposes, different levels of rigor, and different outputs. Confusing the two can lead to a manuscript that promises systematic rigor but delivers a
Systematic Reviews
Systematic reviews and narrative reviews sit at opposite ends of the evidence-synthesis spectrum. A systematic review follows a pre-registered protocol, searches multiple databases exhaustively, screens studies with at least two independent reviewers, assesses risk of bias, and synthesizes findings using statistical pooling or structured narrative methods. A narrative review offers
Comparisons
Paperguide and Covidence are two of the most established platforms for systematic review workflows, but they occupy very different positions in the research technology space. Paperguide is an AI-native platform for scientific research workflows and systematic review where AI search, literature review, systematic review, PDF analysis, structured extraction, reference management,
Literature Reviews
A narrative review provides an expert-driven interpretation of existing research, selecting and synthesizing sources based on the author's knowledge to tell a coherent story about a topic. A scoping review maps the breadth of available evidence using a structured, documented methodology, charting what research exists without providing interpretive
Literature Reviews
A literature review surveys and synthesizes existing research on a topic using qualitative analysis. A meta analysis applies statistical methods to combine quantitative results from multiple studies into a single summary effect estimate. The two serve different purposes, require different skill sets, and produce different types of evidence. Understanding these
Literature Reviews
A literature review surveys and synthesizes existing research to answer a question or establish the state of knowledge on a topic. A scoping review maps the breadth and nature of the available evidence on a topic, identifying key concepts, evidence types, and gaps without narrowing to a specific clinical or
Literature Reviews
A literature review is a broad category of scholarly work that surveys, analyzes, and synthesizes existing research on a topic. A narrative review is one specific type of literature review, characterized by its expert-driven, flexible approach to source selection and synthesis. The confusion between these terms is common because "
Literature Reviews
A meta analysis uses statistical methods to pool quantitative results from multiple studies into a single summary effect estimate. A scoping review maps the breadth and nature of the available evidence on a topic, identifying what research exists, what methods have been used, and where gaps remain. These two approaches