Question

A 50-year-old with suspected PE has intermediate pretest probability. D-dimer is ordered using a high-sensitivity assay reported in FEU. How should age-adjusted thresholds be applied?

Accepted Answer

Use age × 10 ng/mL (FEU) for patients ≥50

Answer

Use fixed cutoff 500 ng/mL for all ages

Answer

Use age × 5 ng/mL (FEU) for patients ≥50

Answer

Do not use age-adjustment with FEU assays

Answer

Age adjustment applies only to women

Practice question

A 50-year-old with suspected PE has intermediate pretest probability. D-dimer is ordered using a high-sensitivity assay reported in FEU. How should age-adjusted thresholds be applied?