Table 1.
Demographics and clinical characteristics.
| All ICUs n = 715 | ICU A n = 267 | ICU B n = 201 | ICU C n = 247 | P value | |
|---|---|---|---|---|---|
| Age, years mean (SD) | 61 (17) | 59 (17) | 62 (17) | 63 (17) | 0.006 |
| Age >=80 n (%) | 95 (13%) | 23 (9%) | 35 (17%) | 37 (15%) | 0.013 |
| Male sex n (%) | 522 (73%) | 206 (77%) | 153 (76%) | 163 (66%) | 0.009 |
| Witnessed OHCA n (%) | 587 (83%) | 222 (83%) | 166 (84%) | 199 (81%) | 0.627 |
| Bystander CPR n (%) | 458 (66%) | 184 (69%) | 142 (74%) | 132 (55%) | <0.001 |
| Location OHCA Home n (%) | 331 (47%) | 108 (44%) | 111 (55%) | 112 (45%) | 0.006 |
| EMS Response time in minutes; Mean (SD) Time to ROSC in witnessed OHCA minutes; Mean (SD) |
9 (5) 26 (17) |
10 (5) 30 (20) |
9 (6) 26 (15) |
8 (6) 21 (13) |
0.007 <0.001 |
| First rhythm shockable n (%) | 430 (62%) | 175 (66%) | 126 (68%) | 129 (54%) | 0.003 |
| Cardiac origin of OHCA n (%) | 497 (73%) | 202 (77%) | 149 (78%) | 146 (63%) | <0.001 |
| TH n (%) | 497 (70%) | 208 (78%) | 151 (76%) | 138 (56%) | <0.001 |
| EEG n (%) CCT n (%) SEP n (%) |
166 (23%) 317 (44%) 22 (3%) |
108 (40%) 128 (48%) 0 (0%) |
36 (18%) 73 (36%) 20(10%) |
24 (10%) 116 (47%) 2(1%) |
<0.001 0.014 <0.001 |
| Survival to discharge n (%) | 301 (42%) | 108 (41%) | 89 (44%) | 104 (42%) | 0.747 |
| Survival to discharge with CPC 1-2, n (%) | 267 (37%) | 94 (35%) | 81 (40%) | 92 (37%) | 0.525 |
CCT= Cranial computer tomography; CPC = Cerebral performance category; EEG = Electroencephalogram; EMS = Emergency medical system; ROSC = Return of spontaneous circulation; SD = Standard deviation; SEP = Somatosensory evoked potentials; TH = Therapeutic hypothermia