Table 2 Baseline Characteristics of Participants With Allergen Samples Collected

Age (years)

Mean 45

Range 10 to 67

Sex

39% male

Years with asthma

Mean 23

Range 1 to 59

Age diagnosed with asthma (years)

Mean 23

Range 0 to 58

ICS treatment

73%

ICS dose (BDP dose equivalent, μg)

Mean 948

Median 800

Range 100 to 4000

Smokers

Never

59%

Ex

30%

Current

12%

Lung function

   FEV₁ (l)

Mean 2.51

Range 0.71 to 4.91

   FVC (l)

Mean 3.48

Range 1.41 to 7.13

PD₂₀ (mg)

GM 0.422

95% CI 0.303 to

0.585

Classification of BHR

None or borderline

10%

(PD₂₀ > 4 mg)

Mild

20%

(PD₂₀ > 1-4 mg)

Moderate to severe

70%

(PD₂₀ ≤ 1 mg)

Exhaled nitric oxide (ppb)

GM 11.04

95% CI 9.66 to 12.61

Atopic (SPT done in 164 subjects)

82%

Sensitized to:

   Dust mite

61%

   Cat

49%

   Dog

43%