The PSA ratio, or free-to-total PSA ratio, measures the proportion of free prostate-specific antigen (PSA) compared to total PSA in the blood. It is determined by dividing the free PSA (not bound to proteins) by the total PSA (both free and protein-bound), then multiplying by 100 to express the result as a percentage. This ratio is useful for differentiating between benign prostate conditions and prostate cancer, particularly in men with moderately elevated total PSA levels.
Testing the PSA ratio can be particularly beneficial for certain men in the context of prostate cancer screening and diagnosis:
Improving your PSA ratio involves addressing factors that can influence both total PSA and free PSA levels. Here are some general strategies that can influence PSA levels:
Several factors can influence your PSA ratio. Understanding these factors is important, as they can affect the interpretation of PSA test results:
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