The role of the occupational environment in the occurrence of cancer of the pancreas was analysed in a case-control study of The results are given for the whole population and also for two subgroups (manual workers and French nationals) not defined from matching criteria. Odds ratios (ORs) were derived from unconditional multivariate logistic regression analysis'8 implemented with the BMDP computer package.'9 All ORs were adjusted for matching criteria (age and sex) and confounding factors-namely, origin, educational level, and consumption of coffee, cigarettes, and alcohol.As no differences were apparent for any of the risk factors studied between the two series of controls, analysis was undertaken with the two control groups combined. For each occupational group, the baseline category was composed of patients who had never been engaged in that particular activity, or who had been engaged in it for less than one year.
ResultsThe group of cases and the group of controls were first considered as a whole; the distribution of occupational categories did not significantly differ between the two groups. The highest risk was observed among the liberal professions and senior executives (OR = 187, 95% confidence interval 425
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