Table 1 Studies connecting spirometric values or incidence of respiratory infections with Vitamin D.
From: A systematic review of the role of vitamin insufficiencies and supplementation in COPD
Vitamin D-Ref | No of participants | FFQ or plasma levels | Results |
|---|---|---|---|
[33] | 18.883 | Plasma levels | Lower 25(OH)D levels were independently associated with recent URTI (odds ratio [OR], 1.36-1,24). The association between 25(OH)D level and URTI was stronger in patients with chronic obstructive pulmonary disease odds ratio; 2.26. |
[35] | 800 | Plasma levels | Subjects with serum 25(OH)D concentrations < 40 nmol/L (n = 24) had significantly (P = 0.004) more days of absence from duty due to respiratory infection (median: 4; quartile 1-quartile 3: 2-6) than did control subjects (2; 0-4; n = 628; incidence rate ratio 1.63; 95% CI: 1.15, 2.24). |
[72] | 14.091 | Plasma levels | The mean difference between the highest and the lowest quintile of 25-hydrocyvitamin D serum concentration was 126 mL (SE:22 mL) in FEV 1, and 172 mL (SE:22 mL) for FVC. |