RESULTS
The cases’ and subcohort’s (not including the three overlapping lung cancer cases)
distributions of demographic, lifestyle and reproductive history details, as of the beginning
of follow-up, are shown in table 1. The cases were somewhat older than the non-cases, and,
as a consequence of being in earlier birth cohorts, also tended to have more children and
earlier year of first employment. As expected, a history of ever having smoked was more
common among cases (11.5%) than in the subcohort (4.6%), and proportionately more cases
(5.9%) than non-cases (1.6%) smoked for 30 years or longer. Alcohol consumption, defined
as at least one drink per month, did not differ between groups.