Table 4

Presence of Cough and Sputum in Non-Smokers, Ex-Smokers and Current Smokers

Cough Of More Than 15 Days

Sputum


Yes

No

Yes

No


Smoking status

n

%

n

%

n

%

n

%


Non-smoker

190

8.7

1993

91.3

182

8.3

1998

91.7

Ex-smoker

23

12.1

167

87.9

20

9.9

182

90.1

Current smoker

163

15.8

851

84.2

149

14.7

865

85.3

Statistical results

x2 = 38.3

p < 0.0001

x2 = 30

p < 0.0001


Bozkurt et al. BMC Public Health 2006 6:15   doi:10.1186/1471-2458-6-15

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