highly significantp < 0.001
Patients with PE detected in CT had a rise of D-dimer levels 5.5-fold the normal maximum (IQR 2.8–17.5); those who did not have it had a mean D-dimer level 1.4 times the normal maximum (IQR 0.76–3.0 times); this difference is highly significant (p < 0.001).