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 76 to 100 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.