PSADT
PSA₁, PSA₂, days between. PSADT = ln(2)×days / ln(PSA₂/PSA₁) when PSA₂>PSA₁ (ng/mL).
Calculator
How it works
PSADT describes exponential PSA growth between two measurements.
Limits
Assumes log-linear growth; not valid after treatment perturbation without specialist interpretation.
Educational tool only—not for diagnosis or treatment decisions.