Table 1.
Baseline characteristics according to teaching status and month.
| Teaching hospital | Non-teaching hospital | |||
|---|---|---|---|---|
|
|
|
|||
| May (n = 10,671) |
July (n = 10,523) |
May (n = 5226) |
July (n = 4973) |
|
| Patient demographics | ||||
| Median age (quartiles) | 70 (58, 79) | 70 (58, 80) | 67 (54, 77) | 66 (54, 77) |
| Female sex | 4462 (42%) | 4314 (41%) | 2223 (43%) | 2162 (43%) |
| Race | ||||
| White | 7029 (71%) | 6824 (71%) | 3842 (77%) | 3649 (77%) |
| Black | 2485 (25%) | 2492 (26%) | 897 (18%) | 892 (19%) |
| Other | 324 (3%) | 364 (4%) | 232 (5%) | 208 (4%) |
| Admission diagnosis | ||||
| Medical cardiac | 3566 (33%) | 3421 (33%) | 2075 (40%) | 2001 (40%) |
| Medical non-cardiac | 4648 (44%) | 4644 (44%) | 2296 (44%) | 2161 (43%) |
| Surgical cardiac | 793 (7%) | 707 (7%) | 314 (6%) | 303 (6%) |
| Surgical non-cardiac | 1164 (11%) | 1224 (12%) | 447 (9%) | 429 (9%) |
| Other | 496 (5%) | 517 (5%) | 92 (2%) | 75 (2%) |
| Pre-existing conditions | ||||
| Heart failure this admission | 1723 (16%) | 1630 (16%) | 961 (18%) | 866 (17%) |
| Heart failure prior to this admission | 2277 (21%) | 2198 (21%) | 1059 (20%) | 1011 (20%) |
| MI this admission | 1629 (15%) | 1499 (14%) | 916 (18%) | 893 (18%) |
| MI prior to this admission | 1715 (16%) | 1681 (16%) | 794 (15%) | 762 (15%) |
| Hypotension | 2771 (26%) | 2874 (28%) | 1326 (25%) | 1348 (27%) |
| Respiratory insufficiency | 4632 (44%) | 4527 (43%) | 2196 (42%) | 2043 (41%) |
| Renal insufficiency | 3495 (33%) | 3460 (33%) | 1824 (35%) | 1621 (33%) |
| Hepatic insufficiency | 795 (7%) | 826 (8%) | 383 (7%) | 349 (7%) |
| Metabolic/electrolyte abnormality | 1856 (17%) | 1924 (18%) | 899 (17%) | 814 (16%) |
| Diabetes | 3264 (31%) | 3162 (30%) | 1641 (31%) | 1512 (31%) |
| Baseline depression in CNS function | 1178 (11%) | 1185 (11%) | 652 (12%) | 612 (12%) |
| Acute stroke | 443 (4%) | 403 (4%) | 204 (4%) | 153 (3%) |
| Acute CNS-event non-stroke | 819 (8%) | 797 (8%) | 368 (7%) | 331 (7%) |
| Pneumonia | 1390 (13%) | 1316 (13%) | 763 (15%) | 704 (14%) |
| Septicemia | 1820 (17%) | 1784 (17%) | 790 (15%) | 769 (16%) |
| Major trauma | 572 (5%) | 609 (6%) | 118 (2%) | 116 (2%) |
| Metastatic/hematologic malignancy | 1313 (12%) | 1409 (13%) | 562 (11%) | 530 (11%) |
| Event characteristics | ||||
| Time of week: weekend | 3444 (32%) | 3372 (32%) | 1659 (32%) | 1536 (31%) |
| Time of day: nighttime | 3528 (33%) | 3575 (34%) | 1750 (34%) | 1658 (34%) |
| Hospital wide response | 7854 (74%) | 7645 (73%) | 4470 (86%) | 4286 (86%) |
| Witnessed | 8746 (82%) | 8707 (83%) | 4331 (83%) | 4083 (82%) |
| Initial rhythm | ||||
| Shockable | 1839 (19%) | 1843 (19%) | 1023 (21%) | 951 (21%) |
| Non-shockable | 8035 (81%) | 7834 (81%) | 3780 (79%) | 3590 (79%) |
Age is expressed as median with quartiles in parentheses. All other variables are number with percent in parentheses.