Serum, Dietary and Supplemental Vitamin D's Association With Cognitive Decline
Public ClinicalTrials.gov record NCT03320109. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Vitamin D Status and Intakes and Their Association With Cognitive Trajectory in a Longitudinal Study of Urban Adults
Study identification
- NCT ID
- NCT03320109
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Lead sponsor
- National Institute on Aging (NIA)
- NIH
- Enrollment
- 3,720 participants
Conditions and interventions
Conditions
Interventions
- Vitamin D Other
Other
Eligibility (public fields only)
- Age range
- 30 Years to 64 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 17, 2004
- Primary completion
- Jul 6, 2013
- Completion
- Jul 6, 2013
- Last update posted
- Oct 24, 2017
2004 – 2013
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Biomedical Research Center, NIA/NIH/IRP | Baltimore | Maryland | 21224 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT03320109, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 24, 2017 · Synced Jul 22, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03320109 live on ClinicalTrials.gov.