Table 2.
Characteristics of ICUs With LMIV and HMIV
| Characteristic | LMIV (n=81) | HMIV (n=41) | P Value |
|---|---|---|---|
| Hospital size (beds) | 0.27 | ||
| 251 to 500 | 31 (38%) | 20 (49%) | |
| >500 | 50 (62%) | 21 (51%) | |
| Hospital type | 0.30 | ||
| Teaching | 25 (31%) | 9 (22%) | |
| Nonteaching | 56 (69%) | 32 (78%) | |
| ICU type | <0.001 | ||
| Coronary care | 5 (6%) | 18 (44%) | |
| Cardiovascular surgical | 2 (2%) | 11 (27%) | |
| Mixed | 38 (47%) | 11 (27%) | |
| Medical | 8 (10%) | 1 (2%) | |
| Surgical | 17 (21%) | 0 (0%) | |
| Neurological | 9 (11%) | 0 (0%) | |
| Trauma | 2 (2%) | 0 (0%) |
HMIV and LMIV indicates high and low annual volume of acute myocardial infarction, respectively; ICU, intensive care unit.