Table 1

 Number of male cases and controls with information on occupation

*Subcategory to all drivers. Drivers who had been driving different types of vehicles in the two censuses were included in both categories. Therefore, the sum of the number of drivers in the different driver categories differs from the number of all drivers.
†Subcategory to other gainfully employed. Manual workers excluding drivers.
All drivers5711361612471111836072
    Bus drivers*11024613110932411339
    Taxi drivers*13928717611493151436
    Lorry drivers*34185332026286613481
Other gainfully employed8919296851026210058519181130270
    Other manual workers†33159954362829639694339593
Total (all drivers and other gainfully employed)9490310461087410529620364136342