Clinical trials
Observational Pain trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
278 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 1 |
| 2001 | 7 |
| 2002 | 2 |
| 2003 | 4 |
| 2004 | 5 |
| 2005 | 7 |
| 2006 | 8 |
| 2007 | 8 |
| 2008 | 14 |
| 2009 | 13 |
| 2010 | 17 |
| 2011 | 12 |
| 2012 | 18 |
| 2013 | 11 |
| 2014 | 16 |
| 2015 | 14 |
| 2016 | 11 |
| 2017 | 10 |
| 2018 | 14 |
| 2019 | 8 |
| 2020 | 14 |
| 2021 | 11 |
| 2022 | 11 |
| 2023 | 15 |
| 2024 | 5 |
| 2025 | 10 |
| 2026 | 5 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 182 |
| Recruiting | 26 |
| Terminated | 24 |
| Unknown status | 14 |
| Active, not recruiting | 12 |
| Withdrawn | 11 |
| Enrolling by invitation | 7 |
| Suspended | 1 |
| Not yet recruiting | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Stanford University | 10 |
| University of Florida | 9 |
| Children's Hospital Medical Center, Cincinnati | 7 |
| M.D. Anderson Cancer Center | 7 |
| University of Washington | 7 |
| The University of Texas Health Science Center at San Antonio | 6 |
| Massachusetts General Hospital | 5 |
| University of Pittsburgh | 5 |
| Wake Forest University Health Sciences | 5 |
| Washington University School of Medicine | 5 |
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 |
|---|---|
| Pain | 278 |
| Chronic Pain | 30 |
| Agnosia | 18 |
| Anxiety Disorders | 15 |
| Postoperative Pain | 15 |
| Fatigue | 12 |
| Breast Neoplasms | 10 |
| Fibromyalgia | 9 |
| Acute Pain | 8 |
| Anemia, Sickle Cell | 8 |
Trials
Showing 1 to 25 of 278. Each trial links to its page on Pharma Observatory.
178 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.