Abstract OBJECTIVE: To establish the relationship between vitamin D serum levels, pulmonary function, and asthma control in children. STUDY DESIGN: We studied the relationship between 25-hydroxy cholecalciferol [25(OH)D] concentrations and baseline spirometry and levels of asthma control, assessed according to Global Initiative for Asthma guidelines and the Childhood Asthma Control Test, in 75 children with asthma (age range 5-11 years; 43 males) in a cross-sectional study carried out during the winter and early spring. RESULTS: Only 9.4% of our children had a sufficient serum 25(OH)D (at least 30 to 40 ng/mL). A significant positive correlation was found between forced vital capacity percent predicted and serum 25(OH)D (r = 0.25, P = .040). This was true also for forced expiratory volume in 1 second, even though it was not statistically significant (r = 0.16, P = .157). Subjects with well-controlled asthma had higher serum levels of 25(OH)D than children with partially controlled or non-controlled asthma, with values of (median [Q1; Q3]) 22.2 (16.3; 25.4), 17.8 (11.8; 22.1) and 18.1 (15.0; 18.5), respectively (P = .023). Furthermore, a positive correlation was found between 25(OH)D and the Childhood Asthma Control Test (r = 0.28; P = .011). CONCLUSIONS: Our results indicate that hypovitaminosis D is frequent in children with asthma living in a Mediterranean country. In those children, lower levels of vitamin D are associated with reduced asthma control.
|Autori:||Chinellato I; Piazza M; Sandri M; Peroni D; Piacentini G; Boner AL|
|Titolo:||Vitamin D Serum Levels and Markers of Asthma Control in Italian Children|
|Anno del prodotto:||2011|
|Digital Object Identifier (DOI):||10.1016/j.jpeds.2010.08.043|
|Appare nelle tipologie:||1.1 Articolo in rivista|