Table 2.
Clinical and demographic characteristics for the 737 cardiac arrest patients, according to survival (discharge from hospital)
| Death (in the field and in hospital; n = 567) | Survivors (discharge from hospital; n = 170) | P value | |
| Male sex (n [%])a | 384 (67.7%) | 111 (65.3%) | 0.224 |
| Age (years; mean ± SD)b | 61.2 ± 14.7 | 60.2 ± 13.3 | 0.861 |
| Initial shockable (VF/VT) rhythm (n [%])a | 209 (36.9%) | 95(55.8%) | 0.206 |
| Witnessed arrests (n [%])a | 314 (55.4%) | 160 (94.1%) | <0.001 |
| Bystander CPR (n [%])a | 86 (15.2%) | 88 (51.8%) | <0.001 |
| Initial PetCO2 (kPa [mmHg]; mean ± SD)b | 2.4 ± 1.9 (17.6.0 ± 14.7) | 3.1 ± 1.4 (23.8 ± 10.7) | <0.001 |
| Final PetCO2 (kPa [mmHg]; mean ± SD)b | 1.9 ± 1.4 (15.0 ± 10.0) | 3.9 ± 1.1 (29.3 ± 8.4) | <0.001 |
| Response time (minutes; mean ± SD)b | 12.7 ± 4.4 | 6.3 ± 3.2 | <0.001 |
aFisher test. bWilcoxon rank sum test. CPR, cardiopulmonary resuscitation; PetCO2, partial end-tidal pressure of carbin dioxide; SD, standard deviation; VF, ventricular fibrillation; VT, ventricular tachycardia.