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Labs commonly report the test as fibrinogen equivalent units (FEUs) with the cutoff at '''500 ng/mL''' and most studies used the FEU values for derivation or validation. If reported by the lab as a D-dimer unit (DDU) the cutoff is often '''230 ng/mL'''. '''2 FEUs equal 1 DDU.'''<br />
*'''Age (years) x 10 ug/L''' for patients > 50 years of age<br />
**Patient age 75 = age adjusted d-dimer of 750 ug/L<br />
*If using a lab with a cutoff of 230 (DDU assay) then formula is '''Age x 5'''</div>FuzzyBot