Table 1.
Characteristics of patients on dialysis and matched nondialysis controls
| Characteristic | Patients on Dialysis | Nondialysis Patients |
|---|---|---|
| (n=8498) | (n=22,646) | |
| Demographics | ||
| Age, yr, median (IQR) | 66 (5674) | 67 (5775) |
| Male | 4770 (56) | 12,925 (57) |
| Race | ||
| White | 4354 (51) | 12,851 (57) |
| Black | 3217 (38) | 7929 (35) |
| Asian/Pacific Islander | 55 (0.6) | 87 (0.4) |
| American Indian/Eskimo | 27 (0.3) | 41 (0.2) |
| Hispanic | 508 (6) | 846 (4) |
| Other | 323 (4) | 842 (4) |
| Cardiac arrest characteristics | ||
| Initial rhythm | ||
| Ventricular fibrillation/pulseless ventricular tachycardia | 1533 (20) | 4298 (21) |
| Asystole/PEA | 6226 (80) | 16,461 (79) |
| Location of arrest | ||
| Intensive care unit | 3889 (46) | 10,657 (47) |
| Monitored unit | 1517 (18) | 3767 (17) |
| Nonmonitored unit | 1602 (19) | 3847 (17) |
| Arrest at night (11pm–7am) | 2792 (36) | 7315 (36) |
| Arrest on weekend or holiday | 2593 (31) | 7199 (32) |
| Arrest on weekend | 2453 (29) | 6849 (30) |
| Illness category | ||
| Medical, cardiac | 2591 (31) | 7804 (345) |
| Medical, noncardiac | 4363 (51) | 10,056 (44) |
| Surgical, cardiac | 446 (5) | 1610 (7) |
| Surgical, noncardiac | 1041 (12) | 2572 (11) |
| Preexisting conditions | ||
| Myocardial infarction (this admission) | 1175 (14) | 3847 (17) |
| Myocardial infarction (prior admission) | 1661 (20) | 3635 (16) |
| Arrhythmia | ||
| Congestive heart failure (this admission) | 1570 (19) | 3946 (17) |
| Congestive heart failure (prior admission) | 2417 (29) | 4791 (21) |
| Diabetes mellitus | 4404 (52) | 7179 (32) |
| Malignancy | 497 (6) | 3043 (13) |
| Stroke | 352 (4) | 961 (4) |
| Respiratory insufficiency | 3117 (37) | 9757 (43) |
| Pneumonia | 906 (11) | 3033 (13) |
| Hepatic insufficiency | 533 (6) | 1644 (7) |
| Septicemia | 1933 (23) | 3542 (16) |
| Metabolic/electrolyte abnormality | 1705 (20) | 3558 (16) |
| Interventions in place at the time of event | ||
| Vascular access | 4123 (92) | 11,150 (92) |
| Arterial catheter | 669 (8) | 2306 (10) |
| Vasodilators | 2022 (24) | 5761 (25) |
| Hemodialysis | 1582 (19) | N/A |
| Invasive airway | 1923 (3) | 6794 (30) |
Data displayed as N (%) unless specified otherwise.
IQR, interquartile range; PEA, pulseless electrical activity; N/A, not applicable.