Clinical trials
Observational Asthma trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
1,254 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 14 |
| 2001 | 11 |
| 2002 | 7 |
| 2003 | 10 |
| 2004 | 21 |
| 2005 | 30 |
| 2006 | 27 |
| 2007 | 61 |
| 2008 | 40 |
| 2009 | 60 |
| 2010 | 43 |
| 2011 | 58 |
| 2012 | 49 |
| 2013 | 34 |
| 2014 | 28 |
| 2015 | 49 |
| 2016 | 46 |
| 2017 | 60 |
| 2018 | 50 |
| 2019 | 58 |
| 2020 | 62 |
| 2021 | 80 |
| 2022 | 61 |
| 2023 | 62 |
| 2024 | 71 |
| 2025 | 53 |
| 2026 | 35 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 778 |
| Unknown status | 203 |
| Recruiting | 112 |
| Terminated | 44 |
| Active, not recruiting | 35 |
| Not yet recruiting | 35 |
| Withdrawn | 31 |
| Enrolling by invitation | 12 |
| Suspended | 4 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| AstraZeneca | 98 |
| National Heart, Lung, and Blood Institute (NHLBI) | 58 |
| GlaxoSmithKline | 24 |
| National Institute of Environmental Health Sciences (NIEHS) | 24 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 22 |
| University of California, San Francisco | 18 |
| Imperial College London | 16 |
| Assistance Publique - Hôpitaux de Paris | 15 |
| Brigham and Women's Hospital | 15 |
| Research in Real-Life Ltd | 15 |
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 |
|---|---|
| Asthma | 1,254 |
| Pulmonary Disease, Chronic Obstructive | 199 |
| Lung Diseases | 77 |
| Hypersensitivity | 75 |
| Rhinitis, Allergic | 44 |
| Disease | 35 |
| Obesity | 34 |
| Heart Failure | 32 |
| Diabetes Mellitus | 29 |
| Respiratory Sounds | 29 |
Trials
Showing 26 to 50 of 1,254. Each trial links to its page on Pharma Observatory.
1,154 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.