http://www.cancer.org/cancer/breastcancer/overviewguide/brea...
http://www.cancer.org/cancer/prostatecancer/detailedguide/pr...
You should also read the article I linked. The point is not simply that the PSA test is ineffective and treatment can be harmful, but that prostate cancer itself is not a big enough threat to justify treatment in most cases.
> not prostate exams in general (i.e. rectal exam palpation). And like mammograms it depends on the population of interest and repeated tests.
BTW do you have a source that shows this is true.
http://seer.cancer.gov/statfacts/html/breast.html http://seer.cancer.gov/statfacts/html/prost.html
23.0 deaths per 100,000 women by breast cancer 23.6 deaths per 100,000 men by prostate cancer
But, yea often prostate cancer isn't enough to warrant it because more likely than not on autopsy you'll find some kind of prostate cancer on a guy that didn't cause his death.
With regard to your question on the effectiveness of digital rectal exams for prostate screening, I'm not sure about specific studies. From the us preventative services task force site where they suggest against the PSA test for screening they mention:
"Periodic digital rectal examinations could also be an alternative strategy worthy of further study. In the only randomized trial demonstrating a mortality reduction from radical prostatectomy for clinically localized cancer, a high percentage of men had palpable cancer."
http://www.uspreventiveservicestaskforce.org/prostatecancers...
What bothers me is the lack of equal awareness and emphasis of prostate cancer with breast cancer even though it has a greater incidence and more profound negative effects from treatment. When a guy gets prostate cancer and has a prostectomy, he will more often than not experience severe erectile dysfunction. I hear a lot about how women feel disempowered when they get a mastectomy even though it can be replaced without any loss in sexual function, but much less on the scarring effects of prostate cancer on men with permanent sexual dysfunction.