Distribution of the occupational category and personal, and potential work-related risk factors according the co-exposure groups in men (N = 8,733) and women (N = 9,285).

Nmiss: Number of missing values. In bold, P < 0.05. *: Test exact de Fisher. α: Technicians and associate professionals perform mostly technical and related tasks and teach at certain educational levels. Most occupations in this group require skills at the third ISCO level (education which begins at the age of 17 or 18 years and leads to an award not equivalent to a first university degree). β: The blue collar worker’ category includes skilled agricultural, forestry and fishery workers (ISCO-08 group 6) and agricultural, forestry and fishery labourers (ISCO-08 group 9, elementary occupations).