Definitions
The questionnaire questions used in this study and the occupation coding can be found in the supplementary materials (Supplementary Tables 1 and 2, We defined occupational exposure as none, intermediate, and high depending on the occupational title and the occupational code assigned to the title previously. The assignment was done via a JEM from the ISCO (International Standard Classification of Occupations) version 1988 (ISCO-88) coding of the occupations. The assessment of the JEM values can be seen in Supplementary Table 3, The time in principle occupation was obtained from the questionnaire and represents the time spent (in years) in the occupation, which was also used as the basis for the exposure figure.From the answers to the postal questions, we were able to form groups by diagnosis, as well as smoking status. Educational level was obtained from the SEI occupational coding as it contains information for post-comprehensive education (in years) that each group needs in a Nordic country. Variables used in the analysis can be seen in Supplementary Table 4, For this study, we combined the occupational exposure and diagnostic group values forming three combined variables (one for each diagnostic combination).