Relationship between prostate specific antigen, prostate volume and age in the benign prostate

Area of Science:

• Urology
• Oncology

Background:

• Prostate specific antigen (PSA) is a key biomarker for prostate health.
• Understanding factors influencing PSA levels, such as age and prostate volume, is crucial for accurate interpretation.
• Benign prostatic hyperplasia (BPH) is common in aging men, affecting prostate size and potentially PSA levels.

Purpose of the Study:

• To investigate the independent relationships between prostate specific antigen (PSA) levels, prostate volume, and age in a cohort of men without prostate cancer.
• To determine if age and prostate volume influence PSA levels independently.
• To assess the potential for PSA adjustments based on age and volume for improved diagnostic accuracy.

Main Methods:

• Cross-sectional community survey involving 472 men.
• Data collection included PSA assay, digital rectal examination (DRE), and transrectal ultrasound (TRUS).
• Statistical analysis, including linear regression, was used to examine correlations and independent associations.

Main Results:

• Mean age was 60 years; mean PSA was 2.4 ng/ml, with 85% < 4 ng/ml.
• Modest correlations were observed between PSA, age, and prostate volume.
• Prostate volume increased with age, and PSA showed an independent association with age even after controlling for volume.

Conclusions:

• Both age and prostate volume independently influence prostate specific antigen (PSA) levels.
• The ratio of PSA to prostate volume increases with age.
• Further evaluation is needed to assess the sensitivity and specificity of volume- and age-adjusted PSA in conjunction with DRE and TRUS for prostate cancer diagnosis.