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

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