Patients with vitamin D deficiency and insufficiency had lower pulmonary function, higher serum IgE level, FENO and a higher number of exacerbations in the last year.
Table 3 and Table 4 showed a significant positive correlation between serum 25(OH)vitamin D and pulmonary function in asthmatic patients. While serum total IgE level, FENO, and number of exacerbations showed a negative correlation with serum 25(OH) vitamin D.