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PSA levels are higher during the summer than during the rest of the year. [55] [56] The "normal" reference ranges for prostate-specific antigen increase with age, as do the usual ranges in cancer (per associated table). [57] [58]
References range may vary with age, sex, race, pregnancy, [10] diet, use of prescribed or herbal drugs and stress. Reference ranges often depend on the analytical method used, for reasons such as inaccuracy, lack of standardisation, lack of certified reference material and differing antibody reactivity. [11]
A PSA of 4 nanograms per milliliter (ng/mL) is typically the cutoff that doctors use to recommend more testing, according to the American Cancer Society. If your levels are between 4 ng/mL and 10 ...
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.
PSA levels between 4 and 10 suggest you could have about a 25 percent chance of prostate cancer, and levels over 10 signal that your chance of having the cancer is more than 50 percent.
PSA is a protein that’s produced by prostate tissue, according to the Mayo Clinic. The test can detect high levels of PSA, which might signal prostate cancer. The test can detect high levels of ...