and Study II (1996–2001) comprised 736
cases and 894 population controls. Detailed job histories were obtained by interview and each job was evaluated
by expert chemist–hygienists to estimate the likelihood and level of exposure to many substances, one of which
was wood dust. Odds ratios (ORs) were computed in relation to different indices of exposure to wood dust, adjusting
for several covariates including smoking. Three datasets were analysed: Study I with population controls, Study I with
cancer controls, and Study II.