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Table 3 Logistic regression analysis of factors used for confirmation of PE in patients with positive D-dimer in prehospital emergency setting

From: Capnometry in suspected pulmonary embolism with positive D-dimer in the field

Factor

OR (95% CI)**

P value#

PaCO2

9.8 (4.2-15.1)

< 0.001

PaO2

14.1(6.9-27.4)

< 0.001

D-dimer

15.3 (6.3-25.8)

< 0.001

PetCO2

7.4 (2.8-17.8)

< 0.001

Cianosis

6.2 (1.8-13.1)

0.013

Previous DVT or/and PE

6.8 (1.5-11.7)

0.021

Smoker

0.14 (0.04-0.34)

< 0.001

  1. CI = confidence interval; DVT = deep venous thrombosis; PaCO2 = partial pressure of arterial carbon dioxide; PaO2 = partial pressure of arterial oxygen; PE = pulmonary embolism; PetCO2 = partial pressure of end-tidal carbon dioxide; OR = odds ratio.
  2. ** Univariable screening was performed on clinical, historical and biochemical variables to identify potential predictors of PE. Odds ratios for the presence of PE were generated and expressed with 95% CI.
  3. # Multivariable analysis with logistic regression was used to identify potential predictor variables of a final diagnosis of PE (variables from univariate analysis with P < 0.05. For entry into model).
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Critical Care

ISSN: 1364-8535