Clinical trials
Observational trials in the United Kingdom
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
6,310 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 10 |
| 2001 | 19 |
| 2002 | 18 |
| 2003 | 16 |
| 2004 | 32 |
| 2005 | 47 |
| 2006 | 47 |
| 2007 | 72 |
| 2008 | 96 |
| 2009 | 113 |
| 2010 | 175 |
| 2011 | 165 |
| 2012 | 202 |
| 2013 | 233 |
| 2014 | 265 |
| 2015 | 296 |
| 2016 | 301 |
| 2017 | 378 |
| 2018 | 379 |
| 2019 | 473 |
| 2020 | 505 |
| 2021 | 531 |
| 2022 | 433 |
| 2023 | 479 |
| 2024 | 394 |
| 2025 | 336 |
| 2026 | 258 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 3,221 |
| Unknown status | 1,239 |
| Recruiting | 919 |
| Active, not recruiting | 338 |
| Terminated | 194 |
| Not yet recruiting | 169 |
| Withdrawn | 105 |
| Enrolling by invitation | 92 |
| Suspended | 33 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Imperial College London | 295 |
| University College, London | 175 |
| University of Edinburgh | 162 |
| University of Nottingham | 149 |
| King's College London | 145 |
| University of Oxford | 141 |
| Royal Marsden NHS Foundation Trust | 123 |
| Guy's and St Thomas' NHS Foundation Trust | 109 |
| University of Leicester | 95 |
| Queen Mary University of London | 73 |
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 | 198 |
| COVID-19 | 163 |
| Heart Failure | 149 |
| Pulmonary Disease, Chronic Obstructive | 145 |
| Cardiovascular Diseases | 120 |
| Asthma | 119 |
| Stroke | 113 |
| Breast Neoplasms | 111 |
| Diabetes Mellitus | 97 |
| Atrial Fibrillation | 92 |
Trials
Showing 26 to 50 of 6,310. Each trial links to its page on Pharma Observatory.
6,210 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.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.