About Pricing FAQs Providers Trials Blog

Login Get started

Finding studies

Your health journey, clearly organized.

Questions? feedback@clareohealth.com

Product

How it works
Pricing
For Providers
Trials

Company

About
Blog
FAQ

Legal

Privacy Policy
Terms of Service

© 2026 Clareo Health. All rights reserved.

Vitamin D, Steroids, and Asthma in African American Youth

NCT01647399·1 site·ClinicalTrials.gov

What this study is about

Take this into the appointment.

Saves the questions and what to expect into your notes, next to the visit they belong to.

Keep this study

Lead

Robert J. Freishtat

Age

6–20

Sex

ALL

Healthy volunteers

Accepted

You may be eligible if

Between 6 and 20 years of age
Physician-diagnosed asthma for 1 year or more
Caretaker/Independent participant willing to sign the written Informed Consent, Assent form when appropriate

You may not be if

Significant, chronic medical illnesses other than asthma
No access to a phone

The record

StatusCompleted

PhaseNo phase

Taking part273

StartedJul 2012

UpdatedMar 28, 2019

Conditions

Where1

Children's National Medical Center
Washington D.C., District of Columbia, United States

Clareo Health | Vitamin D, Steroids, and Asthma in African American Youth