Table 2.
Independent Predictors of Unplanned Intubation, American College of Surgeon National Surgical Quality Improvement Program, 2005–2007
| Variable | Adjusted Hazard Ratio | 95% Confidence Interval |
|---|---|---|
| Age, (years) | ||
| 16–29 | 0.80 | 0.60–1.06 |
| 40–49 | 1.27 | 1.05 – 1.54 |
| 50–59 | 1.66 | 1.39 – 1.99 |
| 60–69 | 2.15 | 1.81 – 2.57 |
| 70–79 | 2.67 | 2.26 – 3.21 |
| ≥80 | 3.30 | 2.76 – 3.94 |
| General Anesthesia | 2.12 | 1.77 – 2.55 |
| Emergency status | 1.64 | 1.52 – 1.76 |
| Transfer status | 1.43 | 1.31 – 1.55 |
| Comorbidity score | ||
| 1 | 1.13 | 1.05 – 1.22 |
| 2–3 | 1.36 | 1.25 – 1.47 |
| 4–5 | 1.83 | 1.62 – 2.06 |
| ≥6 | 1.74 | 1.56 – 1.95 |
| ASA class | ||
| 2 | 2.19 | 1.51 – 3.19 |
| 3 | 6.16 | 4.25 – 8.91 |
| 4–5 | 9.75 | 6.70– 14.17 |
| Preoperative weight loss | 1.63 | 1.48 – 1.80 |
| Any sepsis | 2.09 | 1.95 – 2.25 |
| Any dyspnea | 1.46 | 1.37 – 1.56 |
| Cardiothoracic surgery | 1.84 | 1.64 – 2.06 |
| Vascular abdominal surgery | 1.75 | 1.57 – 1.94 |
| Total operative time, (minutes) | ||
| 120 – 259 | 1.56 | 1.47 – 1.66 |
| 300 – 359 | 2.52 | 2.22 – 2.85 |
| ≥360 | 3.57 | 3.23 – 3.95 |