Table 2. Patient characteristics at the time of respiratory failure.
| Characteristic | NIV success (n=69) | NIV failure (n=43) | P value |
|---|---|---|---|
| SOFA score | 7.92±2.08 | 9.95±2.08 | <0.0001 |
| IABP, n (%) | 1 (1.4) | 4 (9.3) | 0.137 |
| CVVH, n (%) | 2 (2.9) | 4 (9.3) | 0.311 |
| Low cardiac output syndrome, n (%) | 14 (20.3) | 21 (48.8) | 0.002 |
| Renal failure, n (%) | 12 (17.4) | 17 (39.5) | 0.011 |
| Arrhythmia, n (%) | 11 (15.9) | 6 (14.0) | 0.775 |
| Laboratory test | |||
| White blood cell count, ×109/L | 14.1 (10.4–18.1) | 14.1 (10.3–19.4) | 0.613 |
| Platelet count, ×109/L | 96 [60–169] | 76 [35–103] | 0.006 |
| Bilirubin, µmol/L | 25.1 (16.3–45.0) | 35.1 (19.8–70.8) | 0.037 |
| Creatinine, µmol/L | 94 [78–130] | 119 [90–199] | 0.033 |
| Vasoactive-inotropic score | 5.3±2.5 | 6.6±2.2 | 0.004 |
| Respiratory rate, breaths/min | 21.1±3.7 | 22.6±6.1 | 0.304 |
| Heart rate, beats/min | 104.0±25.2 | 104.2±14.2 | 0.952 |
| Time elapsed since extubation, h | 10.6 (4.8–27.6) | 15.1 (1.92–30.0) | 0.373 |
| pH | 7.48±0.24 | 7.41±0.07 | 0.083 |
| PaCO2, mmHg | 38.2±7.5 | 39.6±8.7 | 0.390 |
| PaO2, mmHg | 69 [63–83] | 68 [56–88] | 0.428 |
Data were presented as mean ± SD or median (interquartile range), categorical variables were presented as number (%). CVVH, continuous venovenous hemofiltration; h, hours; IABP, intra-aortic balloon pump; PaCO2, partial pressure of carbon dioxide in arterial blood; PaO2, partial pressure of oxygen in arterial blood; SOFA, Sequential Organ Failure Assessment. Vasoactive-inotropic score: dosages of dopamine + dobutamine (ìg/kg/min) + [dosages of epinephrine + norepinephrine + isoproterenol (ìg/kg/min)] ×100 + dosages of milrinone (ìg/kg/min) ×15.