Table 2 Respiratory symptoms and nocturnal gastroesophageal reflux

Any asthma symptom:

28.6 %

54.2 %

0.01

 Wheeze

16.7 %

27.1 %

0.24

  - with breathlessness

4.8 %

14.6 %

0.12

  - without cold

14.3 %

22.9 %

0.30

 Chest tightness

0.0 %

14.6 %

0.01

 Breathlessness at rest

0.0 %

14.6 %

0.01

 Breathlessness after exercise

9.5 %

31.3 %

0.01

 Nocturnal attacks of breathlessness

0.0 %

8.3 %

0.06

 Nocturnal cough

14.3 %

29.2 %

0.09

Any bronchitis symptom:

26.2 %

60.4 %

<0.01

 Chronic morning cough

9.5 %

29.2 %

0.02

 Chronic cough

14.3 %

33.3 %

0.04

  - Coughing at least 3mo/y

11.9 %

27.7 %

0.07

 Chronic morning phlegm

19.1 %

39.6 %

0.03

 Chronic phlegm

9.5 %

20.8 %

0.14

  - Phlegm at least 3mo/y

18.0 %

37.8 %

0.05