Table 2.
Subhazard ratios of baseline characteristics for unplanned extubation
| Patient characteristics | Crude SHR | Adjusted SHR (full model) | Adjusted SHR (stepwise) |
|---|---|---|---|
| Age | 0.976* (0.957 - 0.996) | 0.969* (0.941 - 0.999) | 0.975 (0.950 - 1.00) |
| Male sex (reference: female) | 2.25* (1.10 - 4.63) | 2.54* (1.09 - 5.94) | 2.39* (1.09 - 5.27) |
| Admission to the ICU | 1.15 (0.594 - 2.21) | 1.04 (0.481 - 2.23) | Not included |
| Admission to nonsurgical area | 0.711 (0.360 - 1.41) | 0.473 (0.168 - 1.33) | Not included |
| Primary diagnosis for intubation | |||
| Cardiovascular | 0.762 (0.332 - 1.75) | 1.13 (0.389 - 3.29) | Not included |
| Pulmonary | 0.616 (0.311 - 1.22) | 0.512 (0.190 - 1.38) | 0.441 (0.184 - 1.06) |
| Sepsis | 0.959 (0.327 - 2.812) | 1.29 (0.313 - 5.317) | Not included |
| Neurologic | 1.53 (0.802 - 2.92) | 0.988 (0.404 - 2.42) | Not included |
| Surgical and others | 0.669 (0.162 - 2.77) | 0.162 (0.010 - 2.51) | 0.221 (0.265 - 1.84) |
| CPAP mode (versus other MV modes) (%) | 1.50 (0.672 - 3.35) | 1.79 (0.503 - 6.37) | Not included |
| SAPS II | 1.01 (0.981 - 1.03) | 1.00 (0.974 - 1.03) | Not included |
SHR - standardized hazards ratio; ICU - intensive care unit; CPAP - continuous positive airway pressure; MV - mechanical ventilation; SAPS II - simplified acute physiology score II.
*
p value < 0.05. Results expressed by standardized hazards ratio point estimate and 95% confidence interval (in parentheses).