• Reporting rates for clinical trials are improving in the EU and the US, driven by stricter regulations and increased awareness.
• Compliance varies significantly between countries, with Italy, the Netherlands, Spain, and France lagging in reporting results, especially for publicly funded trials.
• Initiatives like the EU Trials Tracker and advocacy efforts are increasing transparency, but challenges remain in ensuring complete and accurate reporting.
• Experts emphasize the ethical duty of scientists and funders to publish all trial information, regardless of outcome, for the benefit of patients and advancement of medical knowledge.