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Table 1 Characteristics of the 137 adults with asthma

From: Estimation of the effects of heavy Asian dust on respiratory function by definition type

Male/female

58 (42.3)/79 (57.3)

Age (years)

63.5 ± 15.4

Never smoked

92 (67.1)

Former smoker

38 (27.7)

Current smoker

7 (5.2)

Respiratory function

 FVC (L)

2.94 ± 0.70

 FEV1 (L)

2.09 ± 0.60

 %FEV1 (%)

100.4 ± 24.7

Atopic disposition

74 (54.0)

Allergic rhinitis and/or chronic sinusitis

60 (43.8)

Treatment step

 Step 1

1 (0.7)

 Step 2

14 (10.2)

 Step 3

29 (21.2)

 Step 4

87 (63.5)

 Step 5

6 (4.4)

  1. Data are shown as the frequency (percentage) of adults with asthma or the mean ± standard deviation. FEV1: forced expiratory volume in 1 s; %FEV1: percentage of predicted FEV1; FVC: forced vital capacity