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 | x 2 = 38.3 | p < 0.0001 | x 2 = 30 | p < 0.0001 | ||||