Table 2. Arrest and Hospital Characteristics According to AED Use.
| All Patients N = 11,695 |
AED Used n = 4515 |
AED Not Used n=7180 |
P-value | |
|---|---|---|---|---|
| CHARACTERISTICS OF ARREST, no. (%) | ||||
| Monitoring Status | <.001 | |||
| Monitored unit | 6260 (53.5) | 2104 (46.6) | 4156 (57.9) | |
| Non-monitored unit | 5435 (46.5) | 2411 (53.4) | 3024 (42.1) | |
| Time of day | 0.09 | |||
| Day (8a-5p) | 7180 (61.4) | 2821 (62.5%) | 4359 (60.7%) | |
| Night | 4515 (38.6) | 1694 (37.5%) | 2821 (39.3%) | |
| Time of week | 0.51 | |||
| Weekday | 7880 (67.4) | 3026 (67.0) | 4854 67.6) | |
| Weekend | 3815 (32.6) | 1489 (33.0) | 2326 (32.4) | |
| Initial rhythm | <.001 | |||
| Asystole | 5094 (43.6) | 2039 (45.2) | 3055 (42.5) | |
| Pulseless electrical activity | 4522 (38.7) | 1529 (33.9) | 2993 (41.7) | |
| Ventricular fibrillation | 1369 (11.7) | 619 (13.7) | 750 (10.4) | |
| Pulseless ventricular tachycardia | 710 (6.1) | 328 (7.3) | 382 (5.3) | |
| Hospital-wide code blue called | 11,387 (97.4) | 4413 (97.7) | 6974 (97.1) | 0.95 |
| HOSPITAL CHARACTERISTICS, no. (%) | ||||
| Hospital size | <0.001 | |||
| <250 beds | 1996 (17.1) | 1061 (23.5) | 935 (13.0) | |
| 250–499 beds | 4168 (35.6) | 1490 (33.0) | 2678 (37.3) | |
| ≥500 beds | 5531 (47.3) | 1964 (43.5) | 3567 (49.7) | |
| Geographic region | <0.001 | |||
| Northeast | 1598 (13.7) | 492 (10.9) | 1106 (15.4) | |
| Midwest | 2936 (25.1) | 1170 (25.9) | 1766 (24.6) | |
| South | 5354 (45.8) | 2203 (48.8) | 3151 (43.9) | |
| West | 1807 (15.5) | 650 (14.4) | 1157 (16.1) | |
| Teaching status | 0.61 | |||
| None | 4410 (37.7) | 1689 (37.4) | 2721 (37.9) | |
| Residency program | 7285 (62.3) | 2826 (62.6) | 4459 (62.1) | |