Clinical trials
Observational trials in the United Kingdom with unknown status
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
1,239 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 3 |
| 2001 | 1 |
| 2002 | 6 |
| 2003 | 1 |
| 2004 | 4 |
| 2005 | 10 |
| 2006 | 9 |
| 2007 | 11 |
| 2008 | 24 |
| 2009 | 19 |
| 2010 | 23 |
| 2011 | 25 |
| 2012 | 38 |
| 2013 | 53 |
| 2014 | 47 |
| 2015 | 61 |
| 2016 | 55 |
| 2017 | 74 |
| 2018 | 95 |
| 2019 | 121 |
| 2020 | 149 |
| 2021 | 122 |
| 2022 | 104 |
| 2023 | 124 |
| 2024 | 53 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Unknown status | 1,239 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| University College, London | 85 |
| Imperial College London | 67 |
| Royal Marsden NHS Foundation Trust | 56 |
| King's College London | 43 |
| University of Nottingham | 39 |
| University of Oxford | 36 |
| Guy's and St Thomas' NHS Foundation Trust | 34 |
| NHS Greater Glasgow and Clyde | 28 |
| University of Leicester | 27 |
| King's College Hospital NHS Trust | 25 |
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 |
|---|---|
| Neoplasms | 49 |
| COVID-19 | 44 |
| Heart Failure | 37 |
| Breast Neoplasms | 31 |
| Cardiovascular Diseases | 29 |
| Stroke | 29 |
| Pulmonary Disease, Chronic Obstructive | 28 |
| Diabetes Mellitus | 23 |
| Colorectal Neoplasms | 22 |
| Lung Neoplasms | 21 |
Trials
Showing 1 to 25 of 1,239. Each trial links to its page on Pharma Observatory.
1,139 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.