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Table 1 Wells criteria and unenhanced multidetector computed tomography (MDCT) findings in patients with and without pulmonary embolism (PE)

From: Unenhanced multidetector computed tomography findings in acute central pulmonary embolism

  With PE diagnosed by CTPA Without PE confirmed by CTPA p-value
Wells criteria
 DVT 11 (34.4%) 0 (0%) < 0.001
 Alternative diagnosis less likely than PE 32 (100%) 32 (100%) NA
 Heart rate > 100 beats/minute 19 (59.4%) 14 (43.8%) 0.317
 Recent surgery or immobilization 3 (9.4%) 5 (15.6%) 0.708
 Previous PE/DVT 3 (9.4%) 4 (12.5%) 1.000
 Hemoptysis 2 (6.3%) 0 (0%) 0.492
 Malignancy history 6 (18.8) 4 (12.5%) 0.732
Wells score    0.188
  ≥ 4.5 24 (75.5%) 18 (56.3%)  
  <  4.5 8 (25.0%) 14 (43.8%)  
Unenhanced MDCT
 High attenuation in pulmonary artery (PA) 23 (71.9%) 0 (0%) < 0.001
 Main PA dilatation > 33.2 mm 15 (46.9%) 3 (9.4%) 0.002
 Peripheral wedge-shape consolidation 14 (43.8%) 7 (21.9%) 0.109
Number of findings    < 0.001
 0 1 (3.1%) 23 (71.9%)  
 1 13 (40.6%) 8 (25.0%)  
 2 15 (46.9%) 1 (3.1%)  
 3 3 (9.4%) 0 (0%)  
  1. DVT deep vein thrombosis, MDCT multidetector computed tomography, PA pulmonary artery, PE pulmonary embolism
  2. NA: Not applicable since all patients had alternative diagnosis less likely than PE