Table 1
Characteristics of the study subjects according to occupational exposure to noise and smoking status
Non-smoker (n=1693)
Smoker (n=2931)
n
%
n
%
Occupational noise exposure
No
1321
78
1917
65
Yes
372
22
1014
35
Age (y)
≤39
680
40
907
31
40–49
671
40
1474
50
50–60
342
20
550
19