Table 1.
Patient characteristics
| Variable | Group L | Group M | P value |
|---|---|---|---|
| (32.0–33.5 °C) | (34.0–35.0 °C) | ||
| n = 42 | n = 425 | ||
| Age (years) | 52 (44–61) | 61 (53–69) | <0.001 |
| Male (%) | 37 (88 %) | 349 (82 %) | 0.399 |
| Bystander CPR (%) | 18 (43 %) | 225 (53 %) | 0.257 |
| Witness (%) | 27/34 (79 %) | 298/373 (80 %) | 1.000 |
| Cardiogenic cardiac arrest (%) | 41 (98 %) | 398 (94 %) | 0.497 |
| VF/VT (%) | 35/42 (83 %) | 286/419 (68 %) | 0.052 |
| Target temperature (°C) | 33.0 (33.0–33.0) | 34.0 (34.0–34.0) | <0.001 |
| Over-cooling (%) | 15/42 (36 %) | 86/404 (21 %) | 0.051 |
| Interval from collapse to ROSC (min) | 24 (15–41) | 21 (13–34) | 0.154 |
| Interval from ROSC to target temperature (min) | 180 (105–290) | 170 (74–335) | 0.657 |
| Duration of time at the target temperature (h) | 34 (24–50) | 25 (24–38) | 0.004 |
| Rewarming time (days) | 3 (2–4) | 2 (1–3) | <0.001 |
| Cooling method | |||
| Initial infusion of cold fluid | 27/42 (64 %) | 229/425 (54 %) | 0.255 |
| Surface cooling | 27/42 (64 %) | 197/416 (47 %) | 0.051 |
| Device used | |||
| Percutaneous cardiopulmonary support | 6/30 (20 %) | 84/325 (26 %) | 0.661 |
| CPC 1–2 on day 30 | 27 (64 %) | 232 (55 %) | 0.258 |
Values are presented as the n (%) or median (interquartile range)
CPR cardiopulmonary resuscitation, VF ventricular fibrillation, VT, ventricular tachycardia, ROSC return of spontaneous circulation, CPC cerebral performance category