UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Consensus Statement for Protocols of Factorial Randomized Trials Extension of the SPIRIT 2013 Statement

Kahan, BC; Hall, SS; Beller, EM; Birchenall, M; Elbourne, D; Juszczak, E; Little, P; ... Montgomery, AA; + view all (2023) Consensus Statement for Protocols of Factorial Randomized Trials Extension of the SPIRIT 2013 Statement. JAMA Network Open , 6 (12) , Article e2346121. 10.1001/jamanetworkopen.2023.46121. Green open access

[thumbnail of kahan_2023_cs_230008_1701192493.64075.pdf]
Preview
PDF
kahan_2023_cs_230008_1701192493.64075.pdf - Published Version

Download (851kB) | Preview

Abstract

IMPORTANCE Trial protocols outline a trial’s objectives as well as the methods (design, conduct, and analysis) that will be used to meet those objectives, and transparent reporting of trial protocols ensures objectives are clear and facilitates appraisal regarding the suitability of study methods. Factorial trials, in which 2 or more interventions are assessed in the same set of participants, have unique methodological considerations. However, no extension of the Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) 2013 Statement, which provides guidance on reporting of trial protocols, for factorial trials is available. OBJECTIVE To develop a consensus-based extension to the SPIRIT 2013 Statement for factorial trials. EVIDENCE REVIEW The SPIRIT extension for factorial trials was developed using the Enhancing the Quality and Transparency of Health Research (EQUATOR) methodological framework. First, a list of reporting recommendations was generated using a scoping review of methodological articles identified using a MEDLINE search (inception to May 2019), which was supplemented with relevant articles from the personal collections of the authors. Second, a 3-round Delphi survey (January to June 2022, completed by 104 panelists from 14 countries) was conducted to assess the importance of items and identify additional recommendations. Third, a hybrid consensus meeting was held, attended by 15 panelists to finalize selection and wording of the checklist. FINDINGS This SPIRIT extension for factorial trials modified 9 of the 33 items in the SPIRIT 2013 checklist. Key reporting recommendations were that the rationale for using a factorial design should be provided, including whether an interaction is hypothesized; the treatment groups that will form the main comparisons should be identified; and statistical methods for each main comparison should be provided, including how interactions will be assessed. CONCLUSIONS AND RELEVANCE In this consensus statement, 9 factorial-specific items were provided that should be addressed in all protocols of factorial trials to increase the trial’s utility and transparency.

Type: Article
Title: Consensus Statement for Protocols of Factorial Randomized Trials Extension of the SPIRIT 2013 Statement
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1001/jamanetworkopen.2023.46121
Publisher version: http://dx.doi.org/10.1001/jamanetworkopen.2023.461...
Language: English
Additional information: This is an open access article distributed under the terms of the CC-BY License
Keywords: Humans, Randomized Controlled Trials as Topic, Research Design, Consensus, Checklist, Review Literature as Topic
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Inst of Clinical Trials and Methodology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Inst of Clinical Trials and Methodology > MRC Clinical Trials Unit at UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10184715
Downloads since deposit
2Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item