Calculate the D-dimer cutoff adjusted for age to improve PE/DVT workup specificity.
Age-Adjusted Cutoff—
Standard Cutoff—
Result vs Age-Adjusted Cutoff—
Clinical Action—
Age-Adjusted D-Dimer Cutoff (for age > 50):
Cutoff = Age × 10 (ng/mL FEU)
Standard cutoff = 500 ng/mL
Only apply with low/intermediate pretest probability (Wells/Geneva)