[waveman]

This is so frustrating. In medical studies the word "significant" does not mean what it means in normal English. It refers to the possibility that the effect was due to chance, not to how large, important, or clinically significant the effect is.

The study found no significant difference. This does NOT means the study found there was no difference. What it means is that the study was not large enough or the effect was not large enough to prove that the reduction was real at 95% significance.

In fact the screened men died at a LOWER rate. It was just that the effect could possibly have been due to chance.

So realistically the report should say "PSA screening probably saves lives but more study is needed to be sure and to determine how large the effect is".