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Table 1 Characteristics of patients with asthma and healthy volunteers

From: Severe and uncontrolled adult asthma is associated with vitamin D insufficiency and deficiency

  Asthma (n = 280) Healthy controls (n = 40) p-value
Age (years) 45.0 ± 13.8 37.7 ± 13.5 0.002
Gender (male), n (%) 111 (40) 20 (50) 0.232
Allergy, n (%) 236 (84) 22 (55) <0.001
FEV1 (L) 2.5 ± 0.9 3.8 ± 1.0 <0.001
FEV1 (% of pred.) 74.9 ± 23.4 103.6 ± 13.3 <0.001
Exhaled NO (ppb) 40.6 ± 41.5 19.6 ± 9.5 <0.001
ICS use, n (%) 202 (82) - -
OCS use, n (%) 75 (28) - -
Asthma severity, n (%)   -  
 • Intermittent • 18 (6.4)   
 • Mild • 54 (19.3)   
 • Moderate • 53 (18.9)   
 • Severe • 155 (55.4)   
Asthma control, n (%)   -  
 • Controlled • 44 (15.7)   
 • Partly controlled • 92 (32.9)   
 • Uncontrolled • 144 (51.4)   
  1. ICS: inhaled corticosteroids, OCS: oral corticosteroids.
  2. Displayed are means ± SD for continuous endpoints and frequencies for categorical endpoints.