Table 7.
Multiple linear regression analysis with ICU-free days as the dependent outcome variable
| Coefficient (95% CI) | p value | |
| SAPS II (per point) | -0.19 (-0.25, -0.13) | <0.0001 |
| R: Fluid overload | 4.92 (2.31, 7.52) | 0.0002 |
| R: Cardiogenic shock | 3.85 (1.72, 5.97) | 0.0004 |
| RRT | -4.49 (-7.13, -1.85) | 0.0009 |
| Vasopressors | -3.51 (-5.89, -1.13) | 0.004 |
| Dx: Renal | 8.25 (2.02, 14.47) | 0.0096 |
| Age (per year) | -0.08 (-0.15, -0.01) | 0.035 |
| PaO2/FiO2 ratio (Torr) | 0.01 (0.00, 0.02) | 0.039 |
| PiCCO | -0.49 (-2.62, 1.64) | 0.65 |
Coefficient values are presented as medians (with 25th and 75th percentiles). R2 = 0.306. CI, confidence interval; Dx, diagnostic group; ICU, intensive care unit; PaO2/FiO2, partial pressure of oxygen in arterial blood/fraction of inspired oxygen; PiCCO, pulse contour cardiac output; R, reason for catheter insertion; RRT, renal replacement therapy; SAPS II, simplified acute physiology score.