Describing the landscape of nutrition- and diet-related randomized controlled trials: metaresearch study of protocols published between 2012 and 2022
Maps 1,068 published nutrition-trial protocols, describing their intervention designs, transparency practices, and use of reporting guidelines.
Open-science resources
- Open access: Free full text (PMC)
- Shared data: Shared extracted protocol data
- Shared code: SPSS analysis code
- Registration: Study registration
- Protocol: Published protocol
- Preprint: Earlier preprint
Resource verification & source notes
- Free full text (PMC): The complete article body was retrieved from the public NCBI PMC JATS endpoint. This confirms free access; reuse permissions depend on the individual article license.
- Shared extracted protocol data: The article names YWEVS for data/code. Its registration points back to STAR-NUT project B38Z9, whose landscape folder publicly contains the study database and SPSS syntax.
- SPSS analysis code: The article names YWEVS for data/code. Its registration points back to STAR-NUT project B38Z9, whose landscape folder publicly contains the study database and SPSS syntax.
- Study registration: The article explicitly identifies YWEVS as its study registration; the public registration record confirms its title and 2022 registration date.
- Published protocol: The article explicitly cites its previously published full protocol, which matches the 2012–2022 nutrition RCT-protocol landscape study.
- Earlier preprint: Saved catalogue version matching based on title, ordered byline, and study content; prior manuscript DOI retained.
Publication details
Research themes
Reporting transparencyNutrition & aging
Author affiliations & identifiers
- Flávia Moraes Silva: Nutrition Department and Graduate Program of Nutrition Science, Federal University of Health Science of Porto Alegre, Porto Alegre, Brazil.
- Amanda Rodrigues Amorim Adegboye: Centre for Healthcare Research and School of Nursing, Midwifery and Health, Faculty of Health and Life Sciences, Coventry University, Centre for Agroecology, Water and Resilience, Coventry, United Kingdom.
- Celeste Naude: Centre for Evidence-based Health Care, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
- Cintia Curioni: Department of Nutrition in Public Health, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
- Fabio S Gomes: Pan-American Health Organization, World Health Organization, Washington, DC, United States.
- Gary S Collins: UK EQUATOR Centre, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
- Gilberto Kac: Nutritional Epidemiology Observatory, Department of Social and Applied Nutrition, Institute of Nutrition Josué de Castro, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
- Jennifer Anne de Beyer: UK EQUATOR Centre, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
- Jonathan Cook: Oxford Clinical Trials Research Unit, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
- Leila Cheikh Ismail: Department of Clinical Nutrition and Dietetics, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates; Nuffield Department of Women's & Reproductive Health, University of Oxford, Oxford, United Kingdom.
- Matthew J Page: Methods in Evidence Synthesis Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia.
- Neha Khandpur: Division of Human Nutrition and Health, Wageningen University, the Netherlands; Department of Nutrition, University of São Paulo, São Paulo, Brazil; Department of Nutrition, Harvard T.H. Chan School of Public Health, Harvard, Boston, MA, United States.
- Sallie Lamb: Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom.
- Sally Hopewell: Oxford Clinical Trials Research Unit, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
- Shaima Saleh: Department of Clinical Nutrition and Dietetics, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates.
- Shona Kirtley: UK EQUATOR Centre, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
- Simone Bernardes: Nutrition Department and Graduate Program of Nutrition Science, Federal University of Health Science of Porto Alegre, Porto Alegre, Brazil.
- Solange Durão: Health Systems Research Unit, South African Medical Research Council, South Africa.
- Colby J Vorland: Department of Applied Health Science, Indiana University School of Public Health-Bloomington, Bloomington, IN, United States.
- Michael Maia Schlussel: UK EQUATOR Centre, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom. Electronic address: michael.schlussel@csm.ox.ac.uk.
Versions & associated materials
These items belong to this research work. Their individual titles, author lists, and source identifiers are preserved below.
Describing the landscape of nutrition or diet-related randomised controlled trials: meta-research study of protocols published between 2012 and 2022
Preprint & version links
Related materials
Source notes
- CV abbreviates the ordered author list with ellipses; replace with complete authoritative list before displaying full authors.