Predicting prostate cancer

Data came from 40 general practices and from hospital records. Over four years, there were 984 men with new prostate cancers.

Each case was matched with two
men of the same age who did not have cancer. The average age of the patients was 72.8 years.

In the previous five years, 22% of
the men with cancer had been diagnosed with a benign prostate disease. Only 14% of the control group had a similar problem, so the difference was significant.

A separate analysis excluded men who had been diagnosed