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Table 3 Baseline characteristics of the included children

From: Randomized double-blind placebo-controlled trial of sublingual immunotherapy in children with house dust mite allergy in primary care: study design and recruitment

Gender   
  Total
(n = 251)
Percentage
Male 149 59.4%
Female 102 40.6%
Age   
Mean (SD) in years: 11.8 (3.0)   
6–11 years 122 48.6%
12–17 years 129 51.4%
Physical characteristics   
Weight in kg: mean (SD) 47.5 (15.3)  
Height in cm: mean (SD) 154.6 (17.1)  
Season with most complaints of allergy   
Spring 35 13.9%
Autumn 14 5.6%
Spring and autumn/entire year 201 80.1%
Nasal symptoms (scale 0–12)   
Telephone screening: mean (SD) 6.8 (2.1)  
Screening visit in last 3 months: mean (SD) 5.8 (2.3)  
Screening visit in last week: mean (SD) 4.5 (2.6)  
Asthma   
Asthma present 92 36.7%
Asthma medication 99 39.4%
Wheeze/breathless – ever 154 62.3%
Wheeze/breathless – last year 131 53.9%
Dry cough at night – last year 130 52.6%
Sensitization   
One allergen (monosensitized for HDM) 58 23.1%
Two allergens 67 26.7%
Three allergens 72 28.7%
Four allergens 54 21.5%
Sensitization to both HDM and   
Grass pollen 179 71.3%
Tree pollen 108 43.0%
Cat dander 85 33.9%