The prostate specific antigen level is a marker to help determine if a man has prostate cancer. Researchers conducted a study to determine the prevalence of men with prostate cancer who had a PSA level of four or less.
Data was used from the Prostate Cancer Prevention Trial. Among 9,459 men in the trial, 2,950 men never had a PSA level of more than four or an abnormal rectal examination. For this research, those men had their PSA measured and underwent a prostate biopsy. Researchers say 15 percent of the men were diagnosed with prostate cancer results showed the prevalence of prostate cancer in men with the lowest PSA number was about 7 percent, while 27 percent of men with a value of 3.1 to 4.0 PSA had prostate cancer.
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