Table 2.
Outcomes after cardiac arrest stratified by serum potassium and serum calcium levels
| Total | Calcium | Noncalcium | P | |
|---|---|---|---|---|
| Patients with serum potassium level <3.5 mmol/L | ||||
| ROSC (n=103) | 84 (81.6) | 7 (87.5) | 77 (81.1) | 0.65 |
| Survival to hospital admission (n=103) | 60 (58.3) | 6 (75.0) | 54 (56.8) | 0.32 |
| Survival to hospital discharge (n=100) | 22 (22.0) | 2 (25.0) | 20 (21.7) | 0.83 |
| Favorable neurological outcome (n=99) | 9 (9.1) | 1 (12.5) | 8 (8.8) | 0.73 |
| Patients with serum potassium level between 3.5 and 5.5 mmol/L | ||||
| ROSC (n=248) | 205 (82.7) | 6 (40.0) | 199 (85.4) | <0.001 |
| Survival to hospital admission (n=246) | 136 (55.3) | 4 (26.7) | 132 (57.1) | 0.02 |
| Survival to hospital discharge (n=240) | 52 (21.7) | 3 (20.0) | 49 (21.8) | 0.87 |
| Favorable neurological outcome (n=235) | 25 (10.6) | 2 (13.3) | 23 (10.5) | 0.73 |
| Patients with serum potassium level >5.5 mmol/L | ||||
| ROSC (n=248) | 108 (43.5) | 18 (36.7) | 90 (45.2) | 0.28 |
| Survival to hospital admission (n=248) | 46 (18.5) | 5 (10.2) | 41 (20.6) | 0.09 |
| Survival to hospital discharge (n=243) | 14 (5.8) | 2 (4.1) | 12 (6.2) | 0.57 |
| Favorable neurological outcome (n=238) | 6 (2.5) | 0 | 6 (3.1) | 0.22 |
| Patients with serum calcium level <8.5 mg/dL | ||||
| ROSC (n=265) | 216 (81.5) | 13 (65.0) | 203 (82.9) | 0.05 |
| Survival to hospital admission (n=264) | 131 (49.6) | 6 (30.0) | 125 (51.2) | 0.07 |
| Survival to hospital discharge (n=252) | 45 (17.9) | 2 (10.0) | 43 (18.5) | 0.34 |
| Favorable neurological outcome (n=247) | 21 (8.5) | 0 | 21 (9.2) | 0.17 |
| Patients with serum calcium level between 8.5 and 10.2 mg/dL | ||||
| ROSC (n=163) | 138 (84.7) | 12 (66.7) | 126 (86.9) | 0.03 |
| Survival to hospital admission (n=162) | 100 (61.7) | 8 (44.4) | 92 (63.9) | 0.11 |
| Survival to hospital discharge (n=161) | 40 (24.8) | 5 (27.8) | 35 (24.5) | 0.76 |
| Favorable neurological outcome (n=155) | 17 (11.0) | 3 (17.6) | 14 (10.1) | 0.35 |
| Patients with serum calcium level >10.2 mg/dL | ||||
| ROSC (n=171) | 43 (25.1) | 6 (17.6) | 37 (27.0) | 0.26 |
| Survival to hospital admission (n=171) | 11 (6.4) | 1 (2.9) | 10 (7.3) | 0.35 |
| Survival to hospital discharge (n=170) | 3 (1.8) | 0 | 3 (2.2) | 0.38 |
| Favorable neurological outcome (n=170) | 2 (1.2) | 0 | 2 (1.5) | 0.48 |
ROSC: Return of spontaneous circulation