Assessment of Intra-Individual Variationin Prostate-Specific Antigen Levels in a Biennial Randomized Prostate Cancer Screening Program in Sweden

摘要

BACKGROUND The degree of variability in prostate-specific antigen (PSA) measurements is important for interpreting test results in screening programs, and particularly for interpreting the significance of changes between repeated tests. This study aimed to determine the long-term intra-individual variation for PSA in healthy men.