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Table 1 Characteristics of the survey population, according to the post-inclusion questionnaire

From: “A year-long, fortnightly, observational survey in three European countries of patients with respiratory allergies induced by house dust mites: Methodology, demographics and clinical characteristics”

  Italy France Spain
Number of participants (n = M/F), % female. 114 (36/78), 68 % 92 (27/65), 72 % 107 (41/66), 61 %
Age: mean, median [range] (years): 37.5, 36 (18–63) 35.8, 36 (18–62) 38.2, 37 (18–68)
Time since first symptoms: mean, median [range] (years): 15.0, 16 (1–45) 17.8, 18 (1–51) 17.3, 13 (1–40)
Time interval between first symptoms and consultation with a specialist: mean, median [range] (months): 18.9, 4 (0.25–588) 28.4, 6 (0.25–360) 20.3, 11 (0.25–156)
Proportion of patients (%) having consulted the following physicians (mean number of visits per year):    
 GP 92 % (3.4) 91 % (3.0) 70 % (3.9)
 Allerist 87 % (2.0) 83 % (1.7) 70 % (1.4)
 ENT specialist 27 % (2.3) 27 % (2.3) 15 % (1.7)
 Dermatologist 24 % (1.6) 20 % (1.7) 8 % (2.6)
 Pulmonologist 22 % (1.5) 32 % (1.6) 8 % (6.2)
 Paediatrician 14 % (6.8) 9 % (1.0) 7 % (na)
 Other 6 % (4.0) 2 % (1.5) 4 % (1.0)
Other self-reported allergies (% of patients):    
 Grass pollen 79 % 67 % 67 %
 Parietaria pollen 57 % 37 % 9 %
 Cat dander 49 % 51 % 41 %
 Dog dander 31 % 26 % 29 %
 Olive pollen 27 % 41 % 35 %
 Birch pollen 27 % 44 % 7 %
 Moulds 24 % 29 % 35 %
 Cypress pollen 21 % 48 % 9 %
 None (i.e. HDMs only) 39 % 21 % 21 %
Proportion of patients (%) having consulted the following combinations of physicians:    
 GP only 17 % 9 % 5 %
 Allergist only 18 % 4 % 3 %
 GP + allergist 33 % 25 % 31 %
 GP + another specialist 7 % 7 % 5 %
 GP + two specialists 11 % 29 % 26 %
 GP + three or more specialists 4 % 22 % 28 %
Prevalence of co-morbidities (% of patients):    
 Sinusitis 36 % 53 % 26 %
 Otitis 13 % 18 % 9 %
 Conjunctivitis 44 % 43 % 33 %
 Headache 69 % 62 % 69 %
Time having used symptomatic medications (% of patients):    
 Less than 2 years 7 % 3 % 3 %
 2 to 5 years 35 % 28 % 21 %
 6 to 10 years 22 % 39 % 30 %
 11 to 20 years 21 % 23 % 27 %
 More than 20 years 16 % 7 % 15 %
Degree of disease control (% of patients):    
 Totally controlled 11 % 4 % 10 %
 Well controlled 43 % 53 % 48 %
 Moderately controlled 42 % 34 % 33 %
 Poorly controlled 4 % 7 % 7 %
 Not controlled at all 0 % 2 % 3 %
Proportion of patients (%) suffering from symptoms for more than 4 days in a week 70 % 58 % 54 %
Proportion of HDM-only allergic participants (%) with a peak in symptoms. 59 % 63 % 95 %
Proportion of patients (%) taking the following medications:    
 Antihistamines 38 % 40 % 34 %
 Nasal corticoids 7 % 12 % 10 %
 Inhaled corticoids 3 % 3 % 9 %
 Bronchodilators 7 % 12 % 15 %
 Inhaled corticoids + bronchodilator 5 % 7 % 5 %
 Oral or topical corticoids 12 % 3 % 4 %
 Eye drops 4 % 6 % 4 %
 Leukotriene receptor antagonists 2 % 4 % 3 %