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Data

Share of clinical trials in Europe that report results within a year

About this data

Source
Dal-Ré et al. (2021) – processed by Our World in Data
Last updated
November 29, 2021
Date range
2018–2021
Unit
%

Sources and processing

This data is based on the following sources

Dal-Ré et al. – European non-commercial sponsors showed substantial variation in results reporting to the EU trial registry

This is a dataset of clinical trials with results reported to the European Clinical Trials Register (EU-CTR). Under EU guidelines, all clinical trials in the European Economic Area are required to be registered in the EudraCT system and to have results submitted within 12 months of the trial's completion or 6 months for certain paediatric trials, as of December 2016. This requirement to report results was retrospectively applied to all completed trials on the registry dating to its launch in 2004. However, many clinical trials breach these requirements. This dataset shows the proportion of all registered clinical trials by non-commercial sponsors in the European Economic Area that reported results in time on the EU-CTR.

Retrieved on
November 29, 2021
Retrieved from
https://www.sciencedirect.com/science/article/pii/S0895435621003577
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Dal-Ré, R., Goldacre, B., Mahillo-Fernández, I., & DeVito, N. J. (2021). European non-commercial sponsors showed substantial variation in results reporting to the EU trial registry. Journal of Clinical Epidemiology, S0895435621003577. https://doi.org/10.1016/j.jclinepi.2021.11.005

This is a dataset of clinical trials with results reported to the European Clinical Trials Register (EU-CTR). Under EU guidelines, all clinical trials in the European Economic Area are required to be registered in the EudraCT system and to have results submitted within 12 months of the trial's completion or 6 months for certain paediatric trials, as of December 2016. This requirement to report results was retrospectively applied to all completed trials on the registry dating to its launch in 2004. However, many clinical trials breach these requirements. This dataset shows the proportion of all registered clinical trials by non-commercial sponsors in the European Economic Area that reported results in time on the EU-CTR.

Retrieved on
November 29, 2021
Retrieved from
https://www.sciencedirect.com/science/article/pii/S0895435621003577
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Dal-Ré, R., Goldacre, B., Mahillo-Fernández, I., & DeVito, N. J. (2021). European non-commercial sponsors showed substantial variation in results reporting to the EU trial registry. Journal of Clinical Epidemiology, S0895435621003577. https://doi.org/10.1016/j.jclinepi.2021.11.005

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All data and visualizations on Our World in Data rely on data sourced from one or several original data providers. Preparing this original data involves several processing steps. Depending on the data, this can include standardizing country names and world region definitions, converting units, calculating derived indicators such as per capita measures, as well as adding or adapting metadata such as the name or the description given to an indicator.

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Citations

How to cite this page

To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Share of clinical trials in Europe that report results within a year”. Our World in Data (2026). Data adapted from Dal-Ré et al.. Retrieved from https://archive.ourworldindata.org/20260512-085513/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.html [online resource] (archived on May 12, 2026).

How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

Dal-Ré et al. (2021) – processed by Our World in Data

Full citation

Dal-Ré et al. (2021) – processed by Our World in Data. “Share of clinical trials in Europe that report results within a year” [dataset]. Dal-Ré et al., “European non-commercial sponsors showed substantial variation in results reporting to the EU trial registry” [original data]. Retrieved May 12, 2026 from https://archive.ourworldindata.org/20260512-085513/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.html (archived on May 12, 2026).

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