Clinical trials
Completed Observational Vitamin D Deficiency trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
125 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2006 | 2 |
| 2007 | 2 |
| 2008 | 7 |
| 2009 | 3 |
| 2010 | 8 |
| 2011 | 4 |
| 2012 | 10 |
| 2013 | 6 |
| 2014 | 6 |
| 2015 | 14 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 12 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 4 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 125 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Kanuni Sultan Suleyman Training and Research Hospital | 5 |
| Creighton University | 3 |
| Second Affiliated Hospital of Wenzhou Medical University | 3 |
| Assistance Publique - Hôpitaux de Paris | 2 |
| Bagcilar Training and Research Hospital | 2 |
| Duzce University | 2 |
| Fayoum University | 2 |
| Gaziosmanpasa Research and Education Hospital | 2 |
| Lv Yingjuan | 2 |
| Medical University of Vienna | 2 |
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 |
|---|---|
| Vitamin D Deficiency | 125 |
| COVID-19 | 9 |
| Obesity | 8 |
| Insulin Resistance | 7 |
| Osteoporosis | 6 |
| Inflammation | 5 |
| Diabetes Mellitus | 4 |
| Bone Diseases, Metabolic | 3 |
| Folic Acid Deficiency | 3 |
| Hyperparathyroidism | 3 |
Trials
Showing 1 to 25 of 125. Each trial links to its page on Pharma Observatory.
25 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.