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Table 2 Clinical and demographic characteristics for the 737 cardiac arrest patients, according to survival (discharge from hospital)

From: Partial pressure of end-tidal carbon dioxide successful predicts cardiopulmonary resuscitation in the field: a prospective observational study

  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
  1. 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.