Table 1

 Background characteristics of the participants

Police officersFire-fighters
ExposedReferenceExposedReference
SD, standard deviation.
*Alcohol consumption was assessed according to the Garretsen index.50
n834634334194
Age in years (SD)44.0 (6.2)44.8 (7.0)51.4 (5.9)38.8 (9.1)
Level of education (%)
    Low22.020.963.452.7
    Intermediate55.854.329.836.6
    High22.224.86.810.8
Alcohol consumption* (%)
    None11.48.24.212.4
    Low to moderate74.375.772.870.6
    Heavy14.316.123.117.0
Smoking habits (%)
    None33.127.932.044.8
    Former smoker31.738.035.029.4
    Current smoker35.334.132.925.8
Male gender (%)88.584.9100100