The epidemiology of prostate cancer

Although there are a number of new leads with regard to risk factors for prostate cancer, more research is required to confirm them. There is little purpose in conducting further case-control studies of prostate cancer-particularly since the use of PSA testing has become widespread. Instead, future epidemiologic studies should focus on prostate tumor subclassification, in terms of method of detection, markers of biological "aggressiveness," and genetic changes.