Table 1 |
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|
Demographic and behavioral characteristics of study subjects from the annual routine health exam and study questionnaire |
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|
Firefighters |
Farm Machinery Factory Workers |
P-Values |
||
|
|
||||
|
Total (N) |
371 |
81 |
-- |
|
|
|
||||
|
Noise level (dBA) |
Mean Range |
76-79* |
82.45 |
-- |
|
|
||||
|
68-115* |
67-98 |
|||
|
|
||||
|
Age at study initiation (2006) |
Mean (S.D.) |
39.46 (6.89) |
44.98 (6.08) |
< 0.0001 |
|
|
||||
|
Alcohol (%) |
222 |
50 |
< 0.0001 |
|
|
|
|
|||
|
no |
40.2 |
38.3 |
||
|
|
|
|||
|
yes |
59.8 |
61.7 |
||
|
|
||||
|
Smoking (%) |
66 |
34 |
< 0.0001 |
|
|
|
|
|||
|
no |
82.2 |
58 |
||
|
|
|
|||
|
yes |
17.8 |
42 |
||
|
|
||||
|
Work period in months (2006) |
Mean (SD) |
134.01 (90.34) |
256.20 (72.74) |
< 0.0001 |
|
|
||||
|
Duration of current employment |
0-10 years |
172 (46.36%) |
3 (3.7%) |
-- |
|
|
||||
|
11-20 years |
155 (41.78%) |
35 (43.2%) |
||
|
|
||||
|
> 20 years |
44 (11.86%) |
43 (53.1%) |
||
|
|
||||
|
Shift length |
9 or 15 |
8 or 10 |
-- |
|
|
|
||||
|
* Historically reported values in Korea. See discussion for fuller description |
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|
Chung et al. BMC Public Health 2012 12:87 doi:10.1186/1471-2458-12-87 |
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