Pondering the PSA test

August 17, 2007
The Thinker by Rodin

Scientists are trying to work out how effective the PSA test is

Many older men in the UK take a blood test that measures the level of a protein called PSA, which can indicate the presence of prostate cancer.

Many people argue that the PSA test should be used as a national screening programme for the disease. But how reliable is it?

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