Table 2

The combined result of D-dimer and ADSF for diagnosing PE (n=102)

Combination of D-dimer assay and ADSFPE (+), n=11PE (−), n = 91
D-dimer (+) and ADSF ≥0.21120
D-dimer (−) or ADSF <0.2071
  • Sensitivity 100% (95% CI 74.1 to 100); specificity 78.0% (95% CI 68.5 to 85.3); and false negativity 0% (95% CI 0% to 5.1%).

  • PE, pulmonary embolism; ADSF, alveolar dead space fraction.