Abstract
Purpose
Clinical trials transparency requires trial registration and the posting of results on a public register. US regulations also require the posting of protocols and statistical analysis plans (SAPs). For US Federal agency funded trials to be started on or after 21 January 2019, informed consent forms (ICFs) must also be posted. Posting these documents is not mandatory in other countries. We aimed to assess compliance with US regulations of trials conducted in the US or in other countries with respect to ICFs, protocols, SAPs, and results.
Methods
This cross-sectional analysis (27 April 2023) comprised completed medicines trials to be started on or after 21 January 2019 registered on ClinicalTrials.gov. Trial data were registered by funder type (i.e., ‘US federal agencies’, industry, and ‘all others’) and development phase.
Results
Of 5,584 trials, 40% were conducted solely in the US. 47% and 12% of US and non-US trials had posted results. Some 40% of US trials had posted protocols and SAPs as did 9% of trials conducted in other countries. Only 10% (US) and 2% (other countries) of trials had posted ICFs. When the margin of the last 2 and 12 months after primary completion date were considered in the analysis, ICF posting rate did not change, but posting results increased to 64% for US trials. ‘US Federal agencies’ funded trials were significantly more likely to post ICFs than industry [OR 23.9 (12.5-45.7; <.001)] or ‘all others’ [OR 3.16 (1.79-5.56; <.001)].
Conclusion
Future interventions should be considered to encourage timely posting of trial results and information.
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Availability of data and materials
All data is provided in the article and supplementary material.
References
World Medical Association (2013) Declaration of Helsinki. Ethical principles for medical research involving human subjects. https://www.wma.net/policies-post/wma-declaration-of-helsinki-ethical-principles-for-medical-research-involving-human-subjects/
World Health Organization (2015) WHO Statement on public disclosure of clinical trials results. https://www.who.int/news/item/09-04-2015-japan-primary-registries-network
International Committee of Medical Journal Editors (2022) Recommendations for the conduct, reporting, editing, and publication of scholarly work in medical journals. https://www.icmje.org/icmje-recommendations.pdf
US Federal Register (2016) Clinical Trials Registration and Results Information Submission. 42CFR11. 81 FR 64982–65157. https://www.govinfo.gov/content/pkg/FR-2016-09-21/pdf/FR-2016-09-21.pdf
Regulation (EU) No. 536/2014 of the European Parliament and of the Council of 16 of April 2014 on clinical trials on medicinal products for human use, and repealing Directive 2001/20/EC. Official J Eur Union L 158/1-76. https://ec.europa.eu/health/sites/health/files/files/eudralex/vol-1/reg_2014_536/reg_2014_536_en.pdf
US Federal Register (2017) DHHS. Federal Policy for the Protection of Human Subjects. 45CFR4. 82 FR 7149–7274. https://www.govinfo.gov/content/pkg/FR-2017-01-19/pdf/2017-01058.pdf
DeVito NJ, Bacon S, Goldacre B (2020) Compliance with legal requirement to report clinical trial results on ClinicalTrials.gov: a cohort study. Lancet 395:361–369
Garg S, Rizvi A, Wee D et al (2022) Gastroenterology Clinical Trials Transparency: An Analysis of Publication Rates From the ClinicalTrials.gov Database. Am J Gastroenterol 117:180–183
Schmaling KB, Landon HS, Nguyen TB, Kaplan RM (2022) Transparency of results reporting for depression treatment studies in ClinicalTrials.gov: a cross-sectional study. BMJ Evid Based Med 27:27–32
Tse T, White S, Gelinas L, Morrell W, Bierer B, Zarin DA (2021) Characterization of Informed Consent Forms Posted on ClinicalTrials.gov. JAMA Netw Open 4:e2135146
Nelson JT, Tse T, Puplampu-Dove Y, Golfinopoulos E, Zarin DA (2023) Comparison of Availability of Trial Results in ClinicalTrials.gov and PubMed by Data Source and Funder Type. JAMA 329:1404–1406
Department of Health and Human Service (2022) Office of Inspector General. The National Institutes of Health did not ensure that all clinical trials results were reported in accordance with federal requirements. A-06-21-0700 https://oig.hhs.gov/oas/reports/region6/62107000.pdf
Ramachandran R, Morten CJ, Ross JS (2021) Strengthening the FDA’s Enforcement of ClinicalTrials.gov Reporting Requirements. JAMA 326:2131–2132
O’Riordan M, Haslberger M, Cruz, Suljic T, Ribgsten M, Bruckner T (2023) Are European Clinical Trial Funders Policies on Clinical Trial Registration and Reporting Improving? – A Cross-Sectional Study. J Clin Translat Sci 7:e166, 1–7
DeVito NJ, Goldacre B (2021) Evaluation of Compliance With Legal Requirements Under the FDA Amendments Act of 2007 for Timely Registration of Clinical Trials, Data Verification, Delayed Reporting, and Trial Document Submission. JAMA Intern Med 181:1128–1130
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RD-R was responsible for the concept and design of the study, acquisition of data, writing the first draft of the manuscript, administrative, technical, or material support and supervision. LM-F was responsible for the statistical analysis of data. Both authors had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Both authors were responsible for interpretation of data and the critical revision of the manuscript for important intellectual content.
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Dal-Ré, R., Mahillo-Fernández, I. Posting of clinical trial results and other critical information from completed medicines trials on ClinicalTrials.gov. Eur J Clin Pharmacol 79, 1385–1390 (2023). https://doi.org/10.1007/s00228-023-03550-z
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DOI: https://doi.org/10.1007/s00228-023-03550-z