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. 2022 Apr 11;22(2):67–74. doi: 10.4103/2452-2473.342805

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