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PRISMA 2020 flow templates

PRISMA — vaccine effectiveness review

Sample PRISMA 2020 flow for a vaccine effectiveness lit review.

PRISMA 2020 flowResearch & AcademicPRISMA 2020 flow syntax docs
Template previewPRISMA 2020 flow
Vaccine effectiveness systematic review1,536 records identified · 3 exclusion reasonsIdentificationScreeningEligibilityIncludedRecords identified from:n = 1,536Databases: 1,450 · Registers: 86Records removed before screeningn = 376Duplicates removed: 312Excluded by automation: 64Records screened (title / abstract)n = 1,160Records excluded by reviewern = 880Reports sought for retrievaln = 280Reports not retrievedn = 14Reports assessed for eligibilityn = 266Reports excluded:n = 161Wrong outcome: n = 52Wrong study design: n = 78No effect estimate: n = 31Studies included in reviewn = 93Reports of included studies: 105Every record is accounted for: all 4 stages of the flow balance.INFO105 reports describe 93 studies: 12 reports are a further paper about a study already counted.OKAll 11 stated counts are whole numbers of records.OKIdentification balances: 1,450 + 86 − 312 − 64 = 1,160 `title_screened`.OKScreening balances: 1,160 − 880 = 280 `abstracts_sought`.OKRetrieval balances: 280 − 14 = 266 `fulltext_assessed` (`other_sought` and `other_unavailable` are not stated and read as zero).OKEligibility balances: 266 − 161 = 105 `reports_included`.OKThe funnel descends: all 4 stage-to-stage comparisons hold — no count is larger than the one before it.OKAll 3 exclusion reasons are named and distinct, accounting for 161 reports.

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title "Vaccine effectiveness systematic review"
db_records 1450
register_records 86
duplicates 312
excluded_auto 64
title_screened 1160
title_excluded 880
abstracts_sought 280
abstracts_unavailable 14
fulltext_assessed 266
exclude_reason "Wrong outcome" 52
exclude_reason "Wrong study design" 78
exclude_reason "No effect estimate" 31
reports_included 105
studies_included 93