The Number of Screening Cycles Needed to Reduce Prostate Cancer Mortality in the Finnish Section of the European Randomized Study of Prostate Cancer (ERSPC).


Department of Urology, Tampere University Hospital, Tampere, Finland. [Email]


The European Randomized Study of Screening for Prostate Cancer (ERSPC) has shown a 21% reduction in prostate cancer mortality by PSA-based screening. The aim of the study is to evaluate screening effect on prostate cancer incidence and mortality in relation to number of screening rounds attended.Experimental Design: The participants in the screening arm of the Finnish trial (31,867 men) were classified according to screening attendance in a time-dependent fashion. Initially, all men in the screening arm were regarded as nonattenders until the first screening attendance, then remained among the once-screened until the second screen and similarly for the possible third round. The control arm was the reference. Follow-up started at randomization and ended at death, emigration, or end of 2013. Prostate cancer incidence and mortality, as well lung cancer and overall mortality were evaluated.