Table 6.
Multiple linear regression analysis with mechanical ventilation-free days as the dependent outcome variable
| Coefficient (95% CI) | p value | |
| SAPS II (per point) | -0.18 (-0.24, -0.11) | <0.0001 |
| R: Fluid overload | 5.76 (2.95, 8.57) | <0.0001 |
| PEEP (cm H2O) | -0.47 (-0.78, -0.17) | 0.0026 |
| Age (per year) | -0.12 (-0.20, -0.04) | 0.0027 |
| PaO2/FiO2 ratio (Torr) | 0.01 (0.00, 0.02) | 0.014 |
| RRT | -3.11 (-5.95, -0.27) | 0.032 |
| R: Cardiogenic shock | 2.44 (0.11, 4.77) | 0.041 |
| PiCCO | -1.51 (-3.82, 0.80) | 0.20 |
Coefficient values are presented as medians (with 25th and 75th percentiles). R2 = 0.259. CI, confidence interval; PaO2/FiO2, partial pressure of oxygen in arterial blood/fraction of inspired oxygen; PEEP, positive end-expiratory pressure; PiCCO, pulse contour cardiac output; R, reason for catheter insertion; RRT, renal replacement therapy; SAPS II, simplified acute physiology score.