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faq

What is Vitamin D?

How many children will take part in the VIDPRESAE study?

Who is eligible to participate in the VIDPRESAE study?

What happens during the VIDPRESAE study?

Are there any costs or benefits to participating in the VIDPRESAE study?

What is Spirometry?

What is Vitamin D?


Vitamin D is a nutrient that is part of a healthy diet.  Vitamin D is important for strong bones.  People who do not get enough vitamin D can develop soft or brittle bones, a condition also called ‘rickets.’ 

Vitamin D is also important for fighting infection, helping nerves carry messages from the brain to the body and also helping the muscles move well. 

How many children will take part in the VIDPRESAE study?


400 Children will participate in the VIDPRESAE study across two study sites, San Francisco, CA and Pittsburgh, PA . At UCSF and SFGH 200 children will be enrolled.

Who is eligible to participate in the VIDPRESAE study?

We are actively recruiting for this study!  If you would like to learn more please contact the study team at 1-866-913-8477 or by email at .(JavaScript must be enabled to view this email address).

Your child may be eligible to participate if he or she is:
• 6-14 years old, has been diagnosed with asthma, AND
• has been taking asthma controller medication daily for at least 6 months.

What happens during the VIDPRESAE study?

Children who qualify to participate will be randomly selected to receive a daily oral Vitamin D supplement or placebo for approximately 1 year. During that year we will ask you to bring your child to approximately 9 study visits, the visits will include Vit D testing, respiratory tests and questionnaires about your child’s asthma.

Are there any costs or benefits to participating in the VIDPRESAE study?

There are no costs to participate in the VIDPRESAE study. All study medications will be provided at no charge. Participants will have their Vitamin D and Calcium level checked at no charge. Study participation includes breathing tests and asthma advice from asthma physicians. Families can contact the study coordinators or the on call physician if the have any questions regarding their child’s asthma. Families will be compensated for their time depending of how long each visit takes, 30 dollars for the 1st hour and 20 dollars for every hour after the first one.

What is Spirometry?

Spirometry is a test that measures the amount of air blown out of the lungs and how fast it comes out. During the test, your child will wear a nose clip, take a big breath in and then blow out all their air hard and fast into a machine called a spirometer. You child will be asked to blow into the spirometer several times. This test tells us how well your child’s lungs are working and will be done at each visit.