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Annals of Intensive Care

Table 3 Multivariate analysis of the different VD/VT estimates and VR at days 1 and 2 (N = 635)

From: Estimated dead space fraction and the ventilatory ratio are associated with mortality in early ARDS

Variable

Day 1

Day 2

OR (95% CI)

p-value

OR (95% CI)

p-value

VD/VT

 Harris–Benedict

1.13 (0.93–1.37)

0.20

1.15 (0.96–1.38)

0.11

 Penn State

1.17 (0.96–1.44)

0.11

1.21 (0.98–1.50)

0.06

 Direct

1.20 (0.97–1.48)

0.09

1.28 (1.02–1.61)

0.03

VR

1.13 (0.97–1.32)

0.10

1.20 (1.01–1.40)

0.03

  1. Corrected for the following co-variates: APACHE IV, PEEP, PaO2/FiO2, driving pressure and compliance of the respiratory system
  2. VD/VT estimated dead space fraction, VR ventilatory ratio
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