Table 1.
Baseline characteristics of included patients with regard to the initial cardiac rhythm
| Shockable rhythms | Non-shockable rhythms | |||
|---|---|---|---|---|
| Intervention (n = 158) | Control (n = 167) | Intervention (n = 259) | Control (n = 267) | |
| Age, years | 64 [56–70] | 62 [53–70] | 67 [57–74] | 67 [57–74] |
| Male gender, n (%) | 143 (86) | 130 (83) | 174 (70) | 187 (70) |
| Suspected cardiac origin of arrest, n (%) | 147 (94) | 136 (94) | 189 (82) | 189 (81) |
| Bystander CPR, n (%) | 119 (74) | 113 (75) | 122 (46) | 122 (50) |
| Estimated time from arrest to CPR (min) | 8 [6–11] | 9 [6–12] | 8 [5–11] | 8 [6–12] |
| Estimated time from call to CPR (min) | 7 [5–10] | 7 [5–10] | 7 [5–10] | 8 [5–12] |
| Estimated time from arrest to ALS (min) | 13 [9–17] | 12 [9–17] | 13 [9–16] | 12 [9–17] |
| Estimated time from arrest to airway protection (min) | 15 [11–20] | 14 [10–18] | 14 [10–18] | 14 [11–18] |
| Estimated time from arrest to randomization (min) | 18 [13–23] | 17 [13–21] | 18 [13–23] | 16 [12–21] |
| Estimated time from arrest to ROSC (min) | 30 [19–40] | 25 [20–33] | 30 [26–37] | 30 [20–41] |
| Estimated time from arrest to hospital admission (min) | 52 [44–62] | 52 [38–62] | 53 [44–65] | 55 [42–70] |
| Estimated time from arrest to hospital cooling (min) | 102 [80–151] | 93 [64–151] | 97 [71–137] | 103 [82–129] |
| Number | 98 | 99 | 80 | 84 |
| Temperature at ER—tympanic, mean (SD) | 34.87 (1.15)a | 35.76 (0.80) | 34.42 (1.40)a | 35.60 (0.72) |
| Temperature at ICU—tympanic, mean (SD) | 34.82 (1.16)a | 35.38 (0.96) | 34.45 (1.32)a | 35.55 (0.92) |
| Temperature at ICU—core, mean (SD) | 34.87 (0.96)a | 35.33 (0.90) | 34.47 (1.38)a | 35.35 (1.06) |
Data are presented as count (%) median [IQRs] or mean (SD)
CPR cardiopulmonary resuscitation, ROSC return of spontaneous circulation, ALS advanced life support, ER emergency room, ICU intensive care unit
ap value < 0.05 between intervention and control group