Data
Number of clinical trials by status
What you should know about this indicator
- Studies are currently active if they are "not yet recruiting", "enrolling by invitation" , "recruiting" or "active, not recruiting".
- "Enrolling by invitation" means the study is not open to the general public. In this case the researchers conducting the study are focusing on a specific group of people and are inviting them to participate in the study.
- "Active, not recruiting" means the study has finished recruiting participants but is still collecting data.
- Studies are finished if they are "completed", "terminated", or "withdrawn". Completed studies have been finished, terminated studies have been stopped before completion, and withdrawn studies have been stopped before enrolling participants.
- Studies which are "paused/suspended" have been put on hold and are not currently recruiting or enrolling participants. They may resume later.
- Studies that provide access to promising investigational treatment for patients with serious conditions (expanded access studies) are not included here.
- Registration in the ClinicalTrials.gov database is mandatory for trials in the United States and for treatments that seek FDA approval, but voluntary for other trials conducted in other countries.
Number of clinical trials by status
Annual number of clinical trials registered globally in the ClinicalTrials.gov database, by status. The status of a clinical trial indicates whether the trial is recruiting participants, has completed, or is in another phase of the study.
Source
ClinicalTrials.gov (2025) – with major processing by Our World in Data
Last updated
July 28, 2025
Next expected update
July 2026
Date range
1900–2099
Unit
trials
What you should know about this indicator
- Studies are currently active if they are "not yet recruiting", "enrolling by invitation" , "recruiting" or "active, not recruiting".
- "Enrolling by invitation" means the study is not open to the general public. In this case the researchers conducting the study are focusing on a specific group of people and are inviting them to participate in the study.
- "Active, not recruiting" means the study has finished recruiting participants but is still collecting data.
- Studies are finished if they are "completed", "terminated", or "withdrawn". Completed studies have been finished, terminated studies have been stopped before completion, and withdrawn studies have been stopped before enrolling participants.
- Studies which are "paused/suspended" have been put on hold and are not currently recruiting or enrolling participants. They may resume later.
- Studies that provide access to promising investigational treatment for patients with serious conditions (expanded access studies) are not included here.
- Registration in the ClinicalTrials.gov database is mandatory for trials in the United States and for treatments that seek FDA approval, but voluntary for other trials conducted in other countries.
Number of clinical trials by status
Annual number of clinical trials registered globally in the ClinicalTrials.gov database, by status. The status of a clinical trial indicates whether the trial is recruiting participants, has completed, or is in another phase of the study.
Source
ClinicalTrials.gov (2025) – with major processing by Our World in Data
Last updated
July 28, 2025
Next expected update
July 2026
Date range
1900–2099
Unit
trials
Sources and processing
This data is based on the following sources
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.
Notes on our processing step for this indicator
- This data comes from the ClinicalTrials.gov database. Only clinical trials with a "start_date" are included.
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: Number of clinical trials by status”. Our World in Data (2025). Data adapted from ClinicalTrials.gov. Retrieved from https://archive.ourworldindata.org/20250918-121032/grapher/number-of-clinical-trials-by-status.html [online resource] (archived on September 18, 2025).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:
ClinicalTrials.gov (2025) – with major processing by Our World in DataFull citation
ClinicalTrials.gov (2025) – with major processing by Our World in Data. “Number of clinical trials by status” [dataset]. ClinicalTrials.gov, “Clinical Trials (ClinicalTrials.gov)” [original data]. Retrieved December 5, 2025 from https://archive.ourworldindata.org/20250918-121032/grapher/number-of-clinical-trials-by-status.html (archived on September 18, 2025).