Table 1.
—Demographic Characteristics of Nonobese and Morbidly Obese Patients Undergoing IMV: 2004 to 2008
| Patient Characteristicsa | Nonobese | Morbidly Obese |
| Total admissions, No. | 152,638,750 | 4,070,419 |
| Undergoing MV, No. (%) | 4,039,583 (2.6) | 119,759 (2.9) |
| Age, mean ± SD | 63.0 ± 17.8 | 56.5 ± 13.3 |
| Age group | ||
| 18-34 y | 8.6 | 6.3 |
| 35-49 y | 13.7 | 22.7 |
| 50-64 y | 25.6 | 42.5 |
| ≥ 65 y | 52.1 | 28.5 |
| Sex | ||
| Female | 46.1 | 58.8 |
| Race | ||
| White | 52.8 | 53.8 |
| Black | 11.4 | 15.4 |
| Hispanic | 7.0 | 6.8 |
| Asian | 2.0 | 0.7 |
| Others | 2.8 | 2.7 |
| Unknown | 23.9 | 20.6 |
| Insurance | ||
| Medicare | 56.5 | 46.5 |
| Medicaid | 12 | 18.3 |
| Private | 21.6 | 27.4 |
| Self | 6.1 | 4.6 |
| Others | 3.8 | 3.1 |
| Hospital type/size | ||
| Teaching | 51.8 | 44.8 |
| Small | 9.2 | 10.5 |
| Medium | 23.6 | 23.9 |
| Large | 67.2 | 65.7 |
| Admission type | ||
| Elective | 9.5 | 14.6 |
| Urgent care | 13.5 | 13.6 |
| ED | 64.5 | 59 |
| Trauma | 1.3 | 0.4 |
| Others | 11.1 | 12.4 |
Data are given as % unless otherwise indicated. IMV = invasive mechanical ventilation; MV = mechanical ventilation.
a
P < .05 for all characteristics except Hispanic race and the race category “Others,” medium hospital size, and urgent care admission.