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Abstract
PurposeInadequate reporting of nutrition data can hinder the success of nutrition health policies. CONSORT provides guidance for reporting of randomised controlled trials (RCTs) and is required by most journals today, yet reporting of nutrition interventions may benefit from a more tailored approach. A Federation of European Nutrition Societies working group was created to improve quality and completeness of reporting of nutrition trials, and our work to date features a proposal for a CONSORT extension specific to nutrition RCTs. The present manuscript describes a Delphi survey conducted to gather opinion from a wider panel of nutrition and health experts and related interest-holders on our proposal.MethodsWe invited 138 potentially eligible participants to take part in the Delphi survey from a representative spread of expertise and geography. We employed a Likert scale with comments for our 32-item proposal in round 1, and a dichotomous scale with comments for our 29-item proposal in round 2. Threshold for agreement was set at >= 80% for both rounds.ResultsForty-seven potentially eligible participants responded to our invitation, 38 completed the first round and 36 completed the second. N = 23 (72%) items achieved >= 80% in round 1, and 100% of items in round 2. Three items were dropped or merged following round 1. A third Delphi round was not required to obtain consensus.ConclusionsThis Delphi expert consensus proposes a 29-item checklist specific to the reporting of nutrition RCTs and will inform further development of guidance through forthcoming consensus meetings.
Keywords
Guidelines, CONSORT, Nutrition trials, Dietary interventions, Reporting, Expert opinion

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MLA
William, Arnold Josia, et al. “Delphi Survey to Gather Feedback on a CONSORT Extension Proposal for Nutrition Intervention Trials.” EUROPEAN JOURNAL OF NUTRITION, vol. 64, no. 2, 2025, doi:10.1007/s00394-024-03561-1.
APA
William, A. J., Lachat, C., Ahles, S., Murphy, K. J., Minihane, A.-M., Weaver, C., … On behalf of the Federation of European Nutrition Societies (FENS) Working Groups on Improving Standards in the Science of Nutrition., [missing]. (2025). Delphi survey to gather feedback on a CONSORT extension proposal for nutrition intervention trials. EUROPEAN JOURNAL OF NUTRITION, 64(2). https://doi.org/10.1007/s00394-024-03561-1
Chicago author-date
William, Arnold Josia, Carl Lachat, Sanne Ahles, Karen J. Murphy, Anne-Marie Minihane, Connie Weaver, Sangeetha Shyam, Jessica Rigutto-Farebrother, and [missing] On behalf of the Federation of European Nutrition Societies (FENS) Working Groups on Improving Standards in the Science of Nutrition. 2025. “Delphi Survey to Gather Feedback on a CONSORT Extension Proposal for Nutrition Intervention Trials.” EUROPEAN JOURNAL OF NUTRITION 64 (2). https://doi.org/10.1007/s00394-024-03561-1.
Chicago author-date (all authors)
William, Arnold Josia, Carl Lachat, Sanne Ahles, Karen J. Murphy, Anne-Marie Minihane, Connie Weaver, Sangeetha Shyam, Jessica Rigutto-Farebrother, and [missing] On behalf of the Federation of European Nutrition Societies (FENS) Working Groups on Improving Standards in the Science of Nutrition. 2025. “Delphi Survey to Gather Feedback on a CONSORT Extension Proposal for Nutrition Intervention Trials.” EUROPEAN JOURNAL OF NUTRITION 64 (2). doi:10.1007/s00394-024-03561-1.
Vancouver
1.
William AJ, Lachat C, Ahles S, Murphy KJ, Minihane A-M, Weaver C, et al. Delphi survey to gather feedback on a CONSORT extension proposal for nutrition intervention trials. EUROPEAN JOURNAL OF NUTRITION. 2025;64(2).
IEEE
[1]
A. J. William et al., “Delphi survey to gather feedback on a CONSORT extension proposal for nutrition intervention trials,” EUROPEAN JOURNAL OF NUTRITION, vol. 64, no. 2, 2025.
@article{01JK3AMBH80B2D2R62TB0TMD7X,
  abstract     = {{PurposeInadequate reporting of nutrition data can hinder the success of nutrition health policies. CONSORT provides guidance for reporting of randomised controlled trials (RCTs) and is required by most journals today, yet reporting of nutrition interventions may benefit from a more tailored approach. A Federation of European Nutrition Societies working group was created to improve quality and completeness of reporting of nutrition trials, and our work to date features a proposal for a CONSORT extension specific to nutrition RCTs. The present manuscript describes a Delphi survey conducted to gather opinion from a wider panel of nutrition and health experts and related interest-holders on our proposal.MethodsWe invited 138 potentially eligible participants to take part in the Delphi survey from a representative spread of expertise and geography. We employed a Likert scale with comments for our 32-item proposal in round 1, and a dichotomous scale with comments for our 29-item proposal in round 2. Threshold for agreement was set at >= 80% for both rounds.ResultsForty-seven potentially eligible participants responded to our invitation, 38 completed the first round and 36 completed the second. N = 23 (72%) items achieved >= 80% in round 1, and 100% of items in round 2. Three items were dropped or merged following round 1. A third Delphi round was not required to obtain consensus.ConclusionsThis Delphi expert consensus proposes a 29-item checklist specific to the reporting of nutrition RCTs and will inform further development of guidance through forthcoming consensus meetings.}},
  articleno    = {{76}},
  author       = {{William, Arnold Josia and Lachat, Carl and Ahles, Sanne and Murphy, Karen J. and Minihane, Anne-Marie and Weaver, Connie and Shyam, Sangeetha and Rigutto-Farebrother, Jessica and On behalf of the Federation of European Nutrition Societies (FENS) Working Groups on Improving Standards in the Science of Nutrition., [missing]}},
  issn         = {{1436-6207}},
  journal      = {{EUROPEAN JOURNAL OF NUTRITION}},
  keywords     = {{Guidelines,CONSORT,Nutrition trials,Dietary interventions,Reporting,Expert opinion}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{13}},
  title        = {{Delphi survey to gather feedback on a CONSORT extension proposal for nutrition intervention trials}},
  url          = {{http://doi.org/10.1007/s00394-024-03561-1}},
  volume       = {{64}},
  year         = {{2025}},
}

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