Table 2 Key characteristics of the hospitals participating in the study.
| Variable | Value |
|---|---|
| Region, n (%) | |
| Northeast | 6 (21) |
| South | 10 (35) |
| Midwest | 8 (28) |
| West | 5 (17) |
| ICUs per hospital, mean (SD), range | 4.3 (2.1), 1–8 |
| Total hospital beds, mean (SD) | 504 (265) |
| Total ICU beds, mean (SD) | 46 (23) |
| Specialty ICU types per hospital, n (%) | |
| Medical ICU | 19 (70) |
| Surgical ICU | 20 (74) |
| Coronary care unit | 13 (48) |
| Trauma/burn unit | 13 (48) |
| Neurological ICU | 12 (44) |
| Subjects per hospital, mean (SD), range | 30 (3), 25–41 |
ICU, intensive care unit.