Table 1

Characteristics of the study population at baseline examination

n%
*Unknown duration of employment: n = 2126.
†Unknown smoking status: n = 3137.
Occupation
    Plumbers284314.3
    Carpenters266713.5
    Painters299915.1
    Plasterers204010.3
    Bricklayers633031.9
    Labourers294814.9
Age at baseline examination
    25–34 years601830.4
    35–44 years414120.9
    45–54 years652932.9
    55–64 years313915.8
    Mean (SD)42.6 (10.8) years
Nationality
    German1472574.3
    Former Yugoslavia18149.2
    Italian13596.9
    Turkish12776.4
    Other6523.3
Duration of employment in construction industry*
    <15 years649936.7
    15–29 years635935.9
    ⩾30 years484327.4
    Mean (SD)20.6 (11.8) years
Smoking status†
    Current smoker955957.3
    Former smoker301418.1
    Never smoker411724.7
Total19827100.0