Outcomes according to the severity of accidental hypothermia
| All patients (n=537) | Mild | Moderate | Severe | P values* | |
| (32°C–35°C) | (28°C–31°C) | (<28°C) | |||
| (n=192) | (n=227) | (n=118) | |||
| Primary outcome | |||||
| In-hospital death | 131 (24.4) | 42 (21.9) | 52 (22.9) | 37 (31.4) | 0.133 |
| Secondary outcomes | |||||
| Cardiac arrest during rewarming procedure | 26 (4.8) | 8 (4.2) | 7 (3.1) | 11 (9.3) | 0.032 |
| VF or pulseless VT during rewarming procedure | 20 (3.7) | 4 (2.1) | 5 (2.2) | 11 (9.3) | 0.001 |
| Length of hospital stay in survivors, median (IQR) | 15 (4–35) | 7 (2–21) | 17 (8–39) | 27 (13–54) | <0.001 |
Values are expressed as numbers (percentages) unless indicated otherwise.
↵*Comparisons between the three groups were evaluated with Kruskal-Wallis test for numerical variables and χ2 test for categorical variables.
†Adjusted for sex, age category, the number of medical history, activities of daily living, cold exposure, systolic blood pressure category, presence of acute medical illness and active internal rewarming procedure.
VF, ventricular fibrillation; VT, ventricular tachycardia.