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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

How we process data at Our World in Data

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.

At the link below you can find a detailed description of the structure of our data pipeline, including links to all the code used to prepare data across Our World in Data.

Read about our data pipeline

Reuse this work

  • All data produced by third-party providers and made available by Our World in Data are subject to the license terms from the original providers. Our work would not be possible without the data providers we rely on, so we ask you to always cite them appropriately (see below). This is crucial to allow data providers to continue doing their work, enhancing, maintaining and updating valuable data.
  • All data, visualizations, and code produced by Our World in Data are completely open access under the Creative Commons BY license. You have the permission to use, distribute, and reproduce these in any medium, provided the source and authors are credited.

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).

Download

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Download the data shown in this chart as a ZIP file containing a CSV file, metadata in JSON format, and a README. The CSV file can be opened in Excel, Google Sheets, and other data analysis tools.

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Data API

Use these URLs to programmatically access this chart's data and configure your requests with the options below. Our documentation provides more information on how to use the API, and you can find a few code examples below.

Data URL (CSV format)
https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.csv?v=1&csvType=full&useColumnShortNames=false
Metadata URL (JSON format)
https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.metadata.json?v=1&csvType=full&useColumnShortNames=false

Code examples

Examples of how to load this data into different data analysis tools.

Excel / Google Sheets
=IMPORTDATA("https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.csv?v=1&csvType=full&useColumnShortNames=false")
Python with Pandas
import pandas as pd
import requests

# Fetch the data.
df = pd.read_csv("https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.csv?v=1&csvType=full&useColumnShortNames=false", storage_options = {'User-Agent': 'Our World In Data data fetch/1.0'})

# Fetch the metadata
metadata = requests.get("https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.metadata.json?v=1&csvType=full&useColumnShortNames=false").json()
R
library(jsonlite)

# Fetch the data
df <- read.csv("https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.csv?v=1&csvType=full&useColumnShortNames=false")

# Fetch the metadata
metadata <- fromJSON("https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.metadata.json?v=1&csvType=full&useColumnShortNames=false")
Stata
import delimited "https://ourworldindata.org/grapher/share-of-clinical-trials-that-report-results-within-a-year-over-time.csv?v=1&csvType=full&useColumnShortNames=false", encoding("utf-8") clear