A New Interpretation of the Standard PSA-Test
Ernesto P Esteban1, Lusmeralis Almodovar-Abreu2
1Physics Department, University of Puerto Rico-Humacao, Humacao 00791, Puerto Rico.
Research and Reports in Urology
|March 19, 2020
Summary
This study reinterprets the prostate-specific antigen (PSA) test for prostate cancer (PC) in Puerto Rican men. New PSA cut-off values correlate with tumor size, improving PC screening accuracy and aiding treatment decisions.
Area of Science:
- Urology
- Oncology
- Biostatistics
Background:
- Prostate cancer (PC) is a leading cause of cancer incidence and mortality in Puerto Rico.
- The standard prostate-specific antigen (PSA) screening test has limitations, including false positives and negatives.
- There is a need for improved interpretation of PSA test results for better PC management.
Purpose of the Study:
- To establish novel interpretation criteria for the standard PSA test.
- To correlate total serum PSA levels with prostate cancer tumor volume.
- To enhance the diagnostic accuracy and prognostic value of the PSA test.
Main Methods:
- Statistical analysis of a prostate cancer database of 21,980 Puerto Rican men (2004-2015).
- Categorization of data by age, PSA ranges, and diagnostic year.
- Determination of PSA cut-off values using weighted first percentiles to define tumor volumes (small, intermediate, large).
- Calculation of baseline PSA weighted medians for prognosis.
Main Results:
- Identified PSA cut-off values of 2.1, 6.0, and 10.5 ng/mL correlating with small (1.0 cc), intermediate (2.8 cc), and large (5.0 cc) PC tumors.
- PSA levels above 3.1 ng/mL and 7.0 ng/mL indicated increased risk of tumor growth.
- PSA > 14.1 ng/mL was associated with PC metastasis.
Conclusions:
- A new interpretation of the PSA test is established, linking PSA cut-off values to specific prostate cancer tumor volumes.
- The study provides weighted PSA median values to enhance prognostic capabilities.
- These findings offer a valuable tool for improved clinical decision-making and treatment strategies in prostate cancer management.
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