Table 2 Asthma symptom control according to patient characteristics. Univariate logistic regression analysis was used to analyse the associations with the asthma control levels ‘Well controlled’ and ‘Uncontrolled’

Smoking

Ex-smoker (N = 105)

42 (40.0)

47 (44.8)

16 (15.2)

Current smoker (N = 83)

23 (27.7)

34 (41.0)

26 (31.3)

0.58

0.31–1.07

0.08

2.54

1.25–5.14

0.01

Pack-years

< 30 (N = 133)

47 (35.3)

61 (45.9)

25 (18.8)

≥30 (N = 57)

19 (33.3)

20 (35.1)

18 (31.6)

0.91

0.47–1.76

0.79

1.99

0.98–4.05

0.06

Sex

Female (N = 112)

36 (32.1)

46 (41.1)

30 (26.8)

Male (N = 78)

30 (38.5)

35 (44.9)

13 (16.7)

1.32

0.72–2.41

0.37

0.55

0.26–1.13

0.10

Exacerbation^a

No (N = 139)

59 (42.4)

54 (38.8)

26 (18.7)

Yes (N = 51)

7 (13.7)

27 (52.9)

17 (33.3)

0.22

0.09–0.51

0.001

2.17

1.06–4.47

0.04

ICS

No (N = 11)

3 (27.3)

4 (36.4)

4 (36.4)

Yes (N = 179)

63 (35.2)

77 (43.0)

39 (21.8)

1.45

0.37–5.65

0.59

0.49

0.14–1.75

0.49

ICS + LABA

No (N = 68)

24 (35.3)

25 (36.8)

19 (27.9)

Yes (N = 122)

42 (34.4)

56 (45.9)

24 (19.7)

0.96

0.52–1.79

0.90

0.63

0.32–1.26

0.19

FEV₁/FVC < 0.70^b

No(N = 138)

49 (35.5)

59 (42.8)

30 (21.7)

Yes (N = 52)

17 (32.7)

22 (42.3)

13 (25.0)

0.88

0.45–1.73

0.72

1.20

0.57–2.53

0.63

FEV₁, % of predicted

≥ 80%

40 (39.6)

44 (43.6)

17 (16.8)

<  80%

26 (29.2)

37 (41.6)

26 (29.2)

0.63

0.34–1.15

0.13

2.04

1.02–4.08

0.04

Significant reversibility^c

No (N = 173)

61 (35.3)

76 (43.9)

36 (20.8)

Yes (N = 17)

5 (29.4)

5 (29.4)

7 (41.2)

0.77

0.26–2.27

0.63

2.66

0.95–7.49

0.06