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Clinical Trial Summary

The study aim is in two phases. First phase: to evaluate the influence of vitamin D deficiency on asthma severity, degree of airway obstruction and frequency of asthma exacerbations. Second phase: to evaluate if in patients with vitamin D deficiency (25-OH vitamin D levels below 20 ng/ml), vitamin D supplementation decreases the number of disease exacerbations.


Clinical Trial Description

The first phase of the study consisted of a cross-sectional examination of a cohort of 119 asthmatic patients, who had at least one year regular follow-up in our respiratory clinic, and were not receiving any vitamin D supplementation.

In the second phase patients with vitamin D deficiency (25-OH D values below 20 ng/ml), were recruited in a one year longitudinal study, during which they received vitamin D supplementation. The study started and ended in late autumn-winter season when, at our latitude, sun exposure is lowest. Symptoms, spirometry and number of exacerbations were recorded during both study phases. ;


Study Design

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT02661191
Study type Interventional
Source University of Turin, Italy
Contact
Status Completed
Phase N/A
Start date October 2012
Completion date March 2014

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