Age-Adjusted D-Dimer Calculator
Age-Adjusted D-Dimer Calculator is a health and wellness calculator that helps you calculate the age-adjusted D-dimer cutoff and compare it with a measured value. The formula used is: For age > 50: cutoff = Age × 10 µg/L FEU; otherwise the conventional 500 µg/L cutoff applies. Enter the patient's age in years and the measured D-dimer in µg/L (FEU).
Rates and fees change frequently. Always confirm the current figures
with the official authority before relying on this result.
Formula
For age > 50: cutoff = Age × 10 µg/L FEU; otherwise the conventional 500 µg/L cutoff applies
- Formula: For age > 50: cutoff = Age × 10 µg/L FEU; otherwise the conventional 500 µg/L cutoff applies
- Enter the patient's age in years and the measured D-dimer in µg/L (FEU).
- Applies to patients with low/intermediate pre-test probability. D-dimer assay units vary (FEU vs DDU); confirm your laboratory's units.
Example Calculation
Inputs
- Patient Age: 70 years
- Measured D-Dimer: 600 µg/L FEU
For a 70-year-old, the age-adjusted cutoff is 70 × 10 = 700 µg/L FEU. A measured D-dimer of 600 µg/L is below 700, so it is negative in a low-probability patient — whereas it would be positive against the conventional 500 cutoff.
Frequently asked questions
What is the Age-Adjusted D-Dimer?
The Age-Adjusted D-Dimer Calculator helps you calculate the age-adjusted D-dimer cutoff and compare it with a measured value. Enter the patient's age in years and the measured D-dimer in µg/L (FEU).
When should I use this calculator?
Use this calculator whenever you need a quick, accurate result for calculate the age-adjusted D-dimer cutoff and compare it with a measured value.
What should I enter?
Enter the patient's age in years and the measured D-dimer in µg/L (FEU).
How accurate are the results?
Results are estimates based on the stated formula and assumptions. Verify against your own figures or an authoritative source before acting on them.
How can I verify the calculation manually?
Apply the formula (For age > 50: cutoff = Age × 10 µg/L FEU; otherwise the conventional 500 µg/L cutoff applies) and work through the numbers step by step. If your result differs, re-check units and rounding first.