Table 1 Demographic and baseline data and clinical characteristics (cross-sectional population and longitudinal population sets)

Female

232 (65.0)

76 (61.8)

Caucasian

340 (95.2)

117 (95.1)

Age, years (mean ± SD)

50.5 ± 15.5

52.7 ± 13.6

At least one comorbidity

208 (58.3)

77 (62.6)

Asthma duration, years (mean ± SD)^a

18.4 ± 14.9

19.8 ± 14.5

Age at diagnosis, years (mean ± SD)^a

32.1 ± 17.4

32.7 ± 15.8

Number of asthma exacerbations during the 12 months before enrolment^b

3.6 ± 4.2

4.6 ± 4.1

ACQ total scores^c

2.4 ± 1.2

2.9 ± 1.1

 Non-smoker

265 (74.2)

90 (73.2)

 Former smoker

67 (18.8)

27 (22.0)

 Current smoker

25 (7.0)

6 (4.9)

FEV₁ (L)^d

2.0 ± 0.8

1.7 ± 0.7

IgE serum level, IU/mL, (mean ± SD)^e

434.8 ± 556.4

409.3 ± 394.1

At least one concomitant pharmacological treatment for respiratory disease

–

122 (99.2)

Corticosteroids for systemic use

–

50 (40.7)