Current Smoking in Prospective Cohorts and Nested Case-Control Studies that used Incident
Prostate Cancer Cont’d Study 15 = Thompson et al 1989, 16 = Heikkila et al 1999,
17 = Whittemore et al 1984. Results for ever cigs given in studies 6, 9, 17. Most of these
studies that used incident prostate cancer as the outcome factor found no
association between current smoking and prostate cancer. Exceptions were a cohort of Iowa
elderly rural residents (3), a cohort of Californian health plan members (5) and a cohort
of Swedish construction workers (10).