Clinical trials
Observational trials with unknown status
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
29,244 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 31 |
| 2001 | 24 |
| 2002 | 49 |
| 2003 | 82 |
| 2004 | 108 |
| 2005 | 228 |
| 2006 | 232 |
| 2007 | 324 |
| 2008 | 425 |
| 2009 | 520 |
| 2010 | 658 |
| 2011 | 748 |
| 2012 | 822 |
| 2013 | 814 |
| 2014 | 977 |
| 2015 | 1,082 |
| 2016 | 1,377 |
| 2017 | 1,683 |
| 2018 | 2,008 |
| 2019 | 2,412 |
| 2020 | 3,144 |
| 2021 | 3,265 |
| 2022 | 3,109 |
| 2023 | 3,152 |
| 2024 | 1,711 |
| 2025 | 22 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Unknown status | 29,244 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Assiut University | 1,713 |
| National Taiwan University Hospital | 647 |
| University Hospital, Strasbourg, France | 328 |
| Sohag University | 323 |
| Cairo University | 322 |
| Assistance Publique - Hôpitaux de Paris | 289 |
| Hospices Civils de Lyon | 221 |
| Central Hospital, Nancy, France | 208 |
| Peking University Third Hospital | 180 |
| Peking Union Medical College Hospital | 177 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| COVID-19 | 931 |
| Breast Neoplasms | 586 |
| Neoplasms | 478 |
| Stroke | 432 |
| Heart Failure | 369 |
| Coronary Artery Disease | 361 |
| Diabetes Mellitus | 358 |
| Obesity | 344 |
| Cardiovascular Diseases | 313 |
| Lung Neoplasms | 308 |
Trials
Showing 1 to 25 of 29,244. Each trial links to its page on Pharma Observatory.
29,144 more trials match. See them on Pharma Observatory
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.