4.6 Article

Current practices in studies applying the target trial emulation framework: a protocol for a systematic review

期刊

BMJ OPEN
卷 13, 期 6, 页码 -

出版社

BMJ PUBLISHING GROUP
DOI: 10.1136/bmjopen-2022-070963

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statistics & research methods; oncology; registries; systematic review

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This systematic review aims to investigate the practices of studies that apply the target trial emulation framework to evaluate intervention effectiveness using existing observational data. The review will search multiple databases for relevant study reports and protocols and will use a narrative approach to synthesize and report the findings.
IntroductionObservational studies represent an alternative to estimate real-world causal effects in the absence of available randomised controlled trials (RCTs). Target trial emulation is a framework for the application of RCT design principles to emulate a hypothetical open-label RCT (the hypothetical target trial) using existing observational data as the primary data source as opposed to the prospective recruitment and measurement of randomised units. The aim of this systematic review is to investigate the practices of studies applying the target trial emulation framework to evaluate the effectiveness of interventions. Methods and analysisWe will systematically search in Medline (via Ovid), Embase (via Ovid, entries from medRxiv are included), PsycINFO (via Ovid), SCOPUS, Web of Science, Cochrane Library, the ISRCTN registry and ClinicalTrials.gov for all study reports and protocols which used the trial emulation framework (without time restriction). We will extract information concerning study design, data source, analysis, results, interpretation and dissemination. Two reviewers will perform study selection, data extraction and quality assessment. Disagreements between reviewers will be resolved by a third reviewer. A narrative approach will be used to synthesise and report qualitative and quantitative data. Reporting of the review will be informed by Preferred Reporting Items for Systematic Review and Meta-Analysis guidance (PRISMA). Ethics and disseminationEthical approval is not required as it is a protocol for a systematic review. Findings will be disseminated through peer-reviewed publications and conference presentations.

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