Table 2

Characteristics of subjects with chronic cough and phlegm according to smoking habits

NonsmokersCurrent smokersp‐value
Subjects n7541233
Female %58.947.4<0.001
Age mean±sd31.8±6.833.3±7.0<0.001
Socioeconomic status %<0.001
 Manager, entrepreneur, businessman, clerk51.550.4
 Retired, student, housewife25.215.8
 Unemployed6.98.4
 Blue-collar worker16.425.4
Asthma %26.415.1<0.001
Nasal allergies %44.522.1<0.001