Table 3 Prevalence of chronic respiratory symptoms among 79 coffee workers and 71 controls

Morning cough

All

22(27.8)

14(19.7)

0.26

Non smokers^a

15(26.8)

11(18.0)

0.28

Cough day and night

All

38(48.1)

29(40.8)

0.41

Non smokers

30(53.6)

22(36.1)

0.07

Cough 4-6 days a week

All

24(30.4)

12(16.9)

0.06

Non smokers

19(33.9)

9(14.8)

0.02

Cough more days in 3 months

All

7(8.9)

3(4.2)

0.33^b

Non smokers

7(12.5)

1(1.6)

0.03 ^b

Morning cough with sputum

All

18(22.8)

7(9.9)

0.05

Non smokers

13(23.2)

7(11.5)

0.14

Cough day and night with sputum

All

19(24.1)

11(15.5)

0.22

Non smokers

17(30.4)

8(13.1)

0.03

Cough 4-6 day a week with sputum

All

12(15.2)

4(5.6)

0.07 ^b

Non smokers

10(17.9)

2(3.3)

0.01^b

Cough more days in 3 months with sputum

All

6(7.6)

1(1.4)

n.a

Non smokers

6(10.7)

0

n.a

Dyspnoea I

All

14(17.7)

6(8.5)

0.15

Non smokers

21(21.4)

5(8.2)

0.06

Dyspnoea II

All

11(13.9)

6(8.5)

0.32

Non smokers

10(17.9)

5(8.2)

0.17

Wheezing

All

18(22.8)

18(25.4)

0.85

Non smokers

15(26.8)

11(18.0)

0.28

Chest tightness

All

21(26.6)

9(12.7)

0.04

Non smokers

20(35.7)

7(11.5)

0.002