Table 4.
Logistic regression analysis addressing the main risk factors for noninvasive positive pressure ventilation failure
| Univariate analysis | Multivariate analysis | |||||
|---|---|---|---|---|---|---|
| Risk factors (predictors) | OR | 95 % CI | P value | OR | 95 % CI | P value |
| Age (years) | 0.97 | 0.94–0.99 | 0.015 | 0.96 | 0.93–0.99 | 0.007 |
| Male gender | 2.24 | 0.86–5.83 | 0.100 | |||
| Mean arterial pressure (mmHg) | 0.98 | 0.95–1.00 | 0.037 | |||
| Heart rate (bpm) | 1.02 | 1.00–1.05 | 0.037 | |||
| APACHE II score | 1.10 | 1.00–1.21 | 0.039 | 1.13 | 1.02–1.25 | 0.018 |
| Arterial pH | 0.95 | 0.89–1.01 | 0.116 | |||
| Bicarbonate (mmol/L) | 0.87 | 0.78–0.97 | 0.009 | |||
| Arterial lactate (mg/dL) | 1.05 | 0.99–1.10 | 0.081 | |||
| Transplantation | 10.50 | 2.00–54.95 | 0.005 | |||
| Acute respiratory distress syndrome | 2.57 | 0.68–9.80 | 0.167 | |||
OR Odds ratio, CI Confidence interval, APACHE II Acute physiology and chronic health evaluation II (The score can range from 0 to 71, with higher scores indicating more severe illness)