Table 1 Patients' characteristics and univariable analysis of factors associated with ROSC
From: Hypothermic cardiac arrest: prognostic factors for successful resuscitation before rewarming
Variable | Missing data | ROSC group n = 14 | Non-ROSC group n = 142 | p | Effect size OR (95% CI) |
|---|---|---|---|---|---|
Age (years) | 2% | 58.5 [57–69] | 55 [46–62] | 0.05 | 1.03 (0.99–1.09) |
Sex (male) | 0% | 11 (79%) | 122 (86%) | 0.7 | 0.66 (0.15–2.35) |
Core temperature (°C) | 0% | 25.5 [24–27] | 23.7 [22–25] | < 0.001 | 1.66 (1.21–2.27) |
Circumstances of HCA (witnessed) | 1% | 14 (100%) | 101 (72%) | 0.04 | – |
Circumstances of hypothermia development (outdoors) | 24% | 9 (64%) | 85 (81%) | 0.15 | 0.42 (0.13–1.40) |
CPR duration (min) | 14% | 5 [2–10] | 120 [60–161] | < 0.001 | 0.79 (0.66–0.94) |
Initial rhythm of HCA | 2% | ||||
Asystole | 4 (33%) | 38 (27%) | 0.9 | 1.35 (0.39–4.76) | |
PEA | 2 (17%) | 9 (6%) | 0.5 | 2.93 (0.56–15.45) | |
VF | 6 (46%) | 94 (66%) | 0.1 | 0.44 (0.14–1.38) | |
Blood pH | 4% | 7.09 [7.03–7.18] | 7.03 [6.9–7.14] | 0.1 | 11.3 (0.40–323.6) |
PaO2 (mmHg) | 25% | 91 [81–109] | 65 [48–87] | 0.009 | 1.01 (1.00–1.02) |
PaCO2 (mmHg) | 6% | 49 [33–56] | 48 [37–68] | 0.6 | 0.99 (0.96–1.02) |
BE (mmol/l) | 8% | − 7.2 [− 16.5 to − 4.5] | − 16.7 [− 20 to − 12] | 0.04 | 1.1 (1.01–1.19) |
HCO3 (mmol/l) | 12% | 18 [11.5–25.3] | 13 [10.6–16.3] | 0.08 | 1.13 (1.03–1.24) |
Serum potassium concentration (mmol/l) | 5% | 3.4 [2.9–3.8] | 4.0 [3.2–5] | 0.06 | 0.56 (0.31–1.02) |
Serum lactate concentration (mmol/l) | 8% | 6.6 [3–8.6] | 9.5 [6.5–12.8] | 0.004 | 0.75 (0.62–0.92) |
Hemoglobin level (g/dl) | 12% | 11.9 [10.5–13.4] | 11.2 [8.8–13] | 0.5 | 1.07 (0.88–1.30) |