Table 6

Coefficients and confidence intervals for all covariates using multiple regression for the first year of observations (2006).

2006


β

Confidence Interval


Age

0.458

0.15-0.767


Work duration

0.004

-0.02-0.028


Smoking status (no/yes)*

0.983

-1.695-3.661


Group (Firefighter/Factory worker)**

12.544

9.196-15.892


Age and group (firefighter or farm machinery factory worker) remained significant in the final model

Chung et al. BMC Public Health 2012 12:87   doi:10.1186/1471-2458-12-87

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