Table 1 General characteristics of the study population (n = 547)
From: Respiratory symptoms and occupation: a cross-sectional study of the general population
SYMPTOMATIC GROUP (n = 273) | ASYMPTOMATIC GROUP (n = 274) | ||||
|---|---|---|---|---|---|
n | % | n | % | ||
Smoking | never | 70 | 25.6 | 100 | 36.5 |
current | 120 | 44.0 | 62 | 22.6 | |
ex | 83 | 30.4 | 112 | 40.9 | |
SES | low | 174 | 63.7 | 156 | 56.9 |
intermediate | 57 | 20.8 | 54 | 19.7 | |
high | 42 | 15.4 | 64 | 23.1 | |
Sex | male | 128 | 46.9 | 129 | 47.1 |
female | 145 | 53.1 | 145 | 52.9 | |
Age | years (s.d.) | 48.1 (10.4) | 48.2 (10.5) | ||
Job duration | years (s.d.) | 20.5 (12.1) | 21 (12.0) | ||