Clinical trials
Completed Observational trials in the United Kingdom
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
3,221 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 6 |
| 2001 | 13 |
| 2002 | 8 |
| 2003 | 13 |
| 2004 | 22 |
| 2005 | 26 |
| 2006 | 36 |
| 2007 | 55 |
| 2008 | 60 |
| 2009 | 81 |
| 2010 | 129 |
| 2011 | 126 |
| 2012 | 144 |
| 2013 | 142 |
| 2014 | 181 |
| 2015 | 193 |
| 2016 | 198 |
| 2017 | 251 |
| 2018 | 239 |
| 2019 | 246 |
| 2020 | 262 |
| 2021 | 284 |
| 2022 | 195 |
| 2023 | 150 |
| 2024 | 85 |
| 2025 | 48 |
| 2026 | 9 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 3,221 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Imperial College London | 139 |
| University of Edinburgh | 105 |
| University of Nottingham | 65 |
| AstraZeneca | 59 |
| King's College London | 54 |
| University of Oxford | 53 |
| University of Aberdeen | 49 |
| University College, London | 48 |
| Guy's and St Thomas' NHS Foundation Trust | 46 |
| Portsmouth Hospitals NHS Trust | 44 |
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 | 99 |
| Pulmonary Disease, Chronic Obstructive | 82 |
| Neoplasms | 74 |
| Asthma | 73 |
| Heart Failure | 62 |
| Stroke | 57 |
| Atrial Fibrillation | 52 |
| Diabetes Mellitus | 51 |
| Breast Neoplasms | 47 |
| Diabetes Mellitus, Type 2 | 47 |
Trials
Showing 1 to 25 of 3,221. Each trial links to its page on Pharma Observatory.
3,121 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.