Table 1. Characteristics of Patients Who Received Invasive Mechanical Ventilation at Any Time During the Hospital Staya.
| Characteristic | Total cohort, No. (%) |
|---|---|
| No. | 40 439 |
| Age, mean (SD), yb | 62.6 (16.6) |
| Male sex | 22 191 (54.9) |
| Race/ethnicity | |
| White | 30 337 (75.9) |
| Black | 5099 (12.8) |
| Asian | 561 (1.4) |
| Hispanic | 1456 (3.6) |
| Other/unknown | 2514 (6.3) |
| ICU type | |
| Medical | 4697 (11.6) |
| Medical/surgical | 22 265 (55.1) |
| Surgical | 2789 (6.9) |
| Neurological | 3064 (7.6) |
| Cardiac/cardiothoracic | 7624 (18.9) |
| APACHE IV score, mean (SD) | 73.1 (30.7) |
| APACHE IV predicted mortality, mean (SD), % | 27.9 (26.1) |
| Sequential Organ Failure Assessment score | |
| First value in first 24 h of ICU admission | |
| Mean (SD) | 4.5 (3.7) |
| Median (IQR) | 4 (1-7) |
| Worst value in first 24 h of ICU admission | |
| Mean (SD) | 5.5 (3.9) |
| Median (IQR) | 5 (2-8) |
| Care preferences prior to and within 24 h of ICU admission | |
| Full therapy | 35 552 (87.9) |
| Do not resuscitate | 3201 (7.9) |
| Limitations on life support or other care | 1686 (4.2) |
| Invasive mechanical ventilation before ICU admission | 13 666 (33.8) |
| Time from initiation of invasive mechanical ventilation to ICU admission, median (IQR), min | 106 (21-222) |
| Invasive mechanical ventilation on or after ICU admission | 26 773 (66.2) |
| Time from ICU admission to initiation of invasive mechanical ventilation, median (IQR), min | 110 (21-871) |
| Total duration of ventilation, median (IQR), h | 46.7 (17.0-122.9) |
| ICU length of stay, median (IQR), d | 3.3 (1.7-6.7) |
| ICU mortality | 6723 (16.6) |
| Hospitalization outcomec | |
| Hospital length of stay, median (IQR), d | 7.7 (3.9-14.0) |
| Hospital mortality | 8795 (23.5) |
| Discharge disposition among hospital survivors | |
| Home | 14 123 (49.5) |
| Other hospital | 2051 (7.2) |
| Rehabilitation | 2253 (7.9) |
| Skilled nursing facility | 6171 (21.6) |
| Other | 3942 (13.8) |
Abbreviations: APACHE, Acute Physiology and Chronic Health Evaluation; ICU, intensive care unit; IQR, interquartile range.
a
For missing data information, see eTable 5 in the Supplement.
b
Patients aged older than 89 years set to 90 years per requirements for public data access.
c
Restricted to the first ICU stay that included invasive mechanical ventilation during the hospitalization (n = 37 736).