Table 4.
—Multivariate Analysis: Predictors of Mortality Among All Patients (Morbidly Obese and Nonobese)Undergoing IMV
| Predictor of Mortality | OR | 95% CI |
| Morbid obesity | 0.89 | 0.74-1.06 |
| Age group, y | ||
| 18-34 | Reference | … |
| 35-49 | 1.23 | 1.20-1.27 |
| 50-64 | 1.61 | 1.56-1.64 |
| ≥65 | 2.76 | 2.69-2.83 |
| Sex | ||
| Male | Reference | … |
| Female | 1.00 | 0.99-1.01 |
| Race | ||
| White | Reference | … |
| Black | 0.95 | 0.94-0.97 |
| Hispanic | 0.97 | 0.97-1.01 |
| Asian | 1.06 | 0.96-1.03 |
| Others | 0.98 | 0.96-1.02 |
| Unknown | 0.97 | 0.95-0.98 |
| Insurance | ||
| Medicare | Reference | … |
| Medicaid | 0.95 | 0.92-0.96 |
| Private | 0.94 | 0.92-0.95 |
| Self | 1.21 | 1.17-1.24 |
| Others | 0.93 | 0.90-0.95 |
| Hospital teaching status | ||
| Nonteaching | Reference | … |
| Teaching | 1.07 | 1.06-1.08 |
| Hospital size | ||
| Small | Reference | … |
| Medium | 0.99 | 0.97-1.00 |
| Large | 1.01 | 0.99-1.03 |
| Admission type | ||
| Elective admission | Reference | … |
| From urgent care | 1.40 | 1.37-1.43 |
| From ED | 1.40 | 1.37-1.42 |
| Trauma | 2.07 | 1.97-2.18 |
| Others | 1.40 | 1.37-1.43 |
| Charlson-Deyo comorbidity index | ||
| 0 | Reference | … |
| 1-3 | 1.35 | 1.32-1.37 |
| 4-6 | 1.81 | 1.78-1.85 |
| ≥ 7 | 3.41 | 3.32-3.49 |
| Organ failures, No. | ||
| 0 | Reference | … |
| 1 | 1.77 | 1.76-1.92 |
| 2 | 2.80 | 2.76-2.84 |
| 3 | 4.16 | 4.07-4.24 |
| 4 | 6.11 | 5.91-6.33 |
| 5 or 6 | 9.03 | 8.40-9.71 |
| Year | ||
| 2004 | Reference | … |
| 2005 | 0.93 | 0.91-0.94 |
| 2006 | 0.86 | 0.85-0.87 |
| 2007 | 0.74 | 0.73-0.76 |
| 2008 | 0.71 | 0.70-0.72 |
See Table 1 legend for expansion of abbreviation.