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PSA doubling time calculator differences: What calculator do you use?

Prostate Cancer | Last Active: Dec 29, 2025 | Replies (20)

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@harry100

Mine came out as a negative on both sites...
-31.1 months.
What does that mean?

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Replies to "Mine came out as a negative on both sites... -31.1 months. What does that mean?"

aldenrobert | @aldenrobert | Dec 23, 2025

@harry100
Were both exactly the same results? I have never heard of a negative doubling time.

brianjarvis | @brianjarvis | Dec 23, 2025

@harry100 If your PSADT was negative, that simply means that your PSA decreased during the period you’re measuring.