|
Descriptive statistics of all workers (n = 412) |
|||||
| Smokers (n = 206) |
Non-smokers (n = 206) |
P value |
|||
|
|
|||||
| Mean (SD) |
Range |
Mean(SD) |
Range |
||
|
|
|||||
| Age (year) |
42.7(6.2) |
24–62 |
41.4(7.2) |
26–67 |
0.04 |
| Noise exposure duration (year) |
18.6(6.6) |
2–30 |
17.1(6.9) |
2–32 |
0.02 |
| Hearing threshold at 4000 Hz (dB)* |
34.1(16.4) |
0–80 |
16.4(12.3) |
0–65 |
< 0.001 |
| Smoking (Pack-Year) |
13.6(10.6) |
0.3–78 |
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|
* Better ear | |||||
Pouryaghoub et al. BMC Public Health 2007 7:137 doi:10.1186/1471-2458-7-137 |
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