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Table 5 Outcome of patients with high and low values of PCO2 gap on ICU admission

From: Central venous-to-arterial carbon dioxide difference as a prognostic tool in high-risk surgical patients

Variables PCO2 gap ≥6 mmHg PCO2 gap <6 mmHg P value
(n = 78) (n = 37)
Total duration of MV, days 2.0 (0.0-3.2) 0.0 (0.0-0.0) <0.001
Length of ICU stay, days 6.0 (4.0-8.2) 5.0 (4.0-7.5) 0.287
Length of hospital stay, days 22.5 (17.0-32.2) 16.0 (13.0-23.5) 0.002
Organ failure 46 (59.0%) 8 (21.6%) < 0.001
28-day mortality 9 (11.5%) 0 0.056
  1. Areas under the curve are 0.86; 0.82; 0.67; 0.67 and 0.57, respectively. Data are presented as medians (interquartile range) or absolute value (%). Significant P values are indicated in bold text. MV, mechanical ventilation; PCO2 gap, central venous-to-arterial difference in carbon dioxide.