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Table 5 Comparison of characteristics and values of PetCO2 between patients with ROSC and without ROSC in shockable initial rhythm in cardiac arrest

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

  ROSC (n = 211) Non-ROSC (n = 93) P value
Age (years) 58.6 ± 10.9 61.8 ± 13.6 0.03
Initial PetCO2 (kPa [mmHg]) 2.7 ± 1.1 (20.3 ± 9.2) 1.8 ± 1.3 (13.5 ± 10) <0.001
1 minute PetCO2 (kPa [mmHg]) 3.6 ± 1.3 (27.1 ± 10) 2.6 ± 1.4 (19.6 ± 11) <0.001
Average PetCO2 (0 to 10 minutes; kPa [mmHg]) 2.9 ± 0.8 (21.8 ± 6.1) 1.1 ± 0.4 (8.3 ± 3.1) <0.001
10 minute PetCO2 (kPa [mmHg]) 3.3 ± 0.9 (24.8 ± 6.8) 1.2 ± 0.5 (9.1 ± 4.2) <0.001
11 to 15 minute PetCO2 (kPa [mmHg]) 3.2 ± 0.7 (24.1 ± 5.1) 0.9 ± 0.3 (6.8 ± 2.7) <0.001
15 minute PetCO2 (kPa [mmHg]) 3.7 ± 0.9 (27.9 ± 6.8) 1.1 ± 0.4 (8.3 ± 3.4) <0.001
20 minute PetCO2 (kPa [mmHg]) 4.3 ± 1.1 (32.3 ± 8.7) 0.9 ± 0.3 (7.1 ± 2.6) <0.001
Max PetCO2 (kPa [mmHg]) 5.3 ± 1.5 (39.9 ± 11.3) 1.7 ± 0.6 (12.8 ± 5.5) <0.001
Final PetCO2 (kPa [mmHg]) 3.7 ± 0.9 (27.8 ± 6.6) 1.0 ± 0.3 (7.5 ± 2.7) <0.001
  1. 'Shockable' was defined as ventricular fibrillation or pulseless tachycardia. Values are expressed as mean ± standard deviation. PetCO2, partial pressure of end-tidal carbon dioxide; ROSC, restoration of spontaneous circulation