Dr Nora Pashyan and colleagues gave over 40,000 men PSA testing as part of a study to identify advanced stage prostate cancers. PSA testing led to an overdiagnosis of about one in 10 of those in the 50-59 age group but this increased to three in 10 in the 60-69 age group.
Dr Pashyan said: 'Any screening strategy should take into account the potential benefits and harms of screening.
'A valuable target for future research would be to estimate the benefit of screening at different ages.'
The DoH is currently reviewing the case for PSA screening for prostate cancer.
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