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In a revision of its 2002 recommendations, the US Preventive Services Task Force also said more data was needed to assess the balance of benefit and harm in administering the routine cancer detection tests in men younger than 75.
Prostate-specific antigen (PSA) screening is a blood test that enables detection of prostate cancer before symptoms develop, at an early stage when it remains potentially curable.
Widespread use of the test has led to high rate of detection. In 2007, more than 218 000 Americans were diagnosed with prostate cancer, government statistics show.
Treatment can adversely affect life
"While the PSA tests are effective for detecting disease, the task force found that there is insufficient evidence that they improve long-term health outcomes," the American College of Physicians, which publishes the journal, said in a statement.
Because prostate cancer usually progresses very slowly, it does not affect the health or life expectancy in 29 to 44 percent of men diagnosed with the disease, the task force report said.
But treatment can adversely affect quality of life, leading to erectile dysfunction, urinary incontinence, bowel dysfunction, and death.
"We carefully reviewed the available evidence to measure the benefits and harms of screening for prostate cancer and could not find adequate proof that early detection leads to fewer men dying of the disease," said task force chairman Ned Calonge.
Men advised to talk to doctors before deciding
"At this point, we recommend that men concerned about prostate cancer talk with their health care providers to make a decision based on their individual risk factors and personal preference."
Prostate cancer is the second most common form of cancer among men in the United States, after skin cancer, and the second leading cause of mortality from cancer in the country, affecting one in six American men, the report said.
The task force's recommendations are accessible on the website of the magazine, at www.annals.org. – (Sapa, August 2008)
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