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Table 6 Comparison of characteristics and values of PetCO2 between patients with ROSC and without ROSC in nonshockable 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 = 191) Non-ROSC (n = 242) P value
Age (years) 59.6 ± 12.9 60.5 ± 12.9 0.45
Initial PetCO2 (kPa [mmHg]) 3.7 ± 1.9 (27.8 ± 14.3) 3.1 ± 2.6 (23.3 ± 19.6) 0.02
1 minute PetCO2 (kPa [mmHg]) 2.8 ± 1.6 (21.1 ± 13.2) 2.7 ± 1.4 (20.3 ± 11.2) 0.44
Average PetCO2 (0 to 10 minutes; kPa [mmHg]) 2.8 ± 0.9 (22.2 ± 6.8) 1.1 ± 0.4 (7.8 ± 3.8) < 0.001
10 minute PetCO2 (kPa [mmHg]) 3.3 ± 1.1 (24.8 ± 7.8) 1.2 ± 0.5 (8.2 ± 3.6) <0.001
Average 11 to 15 minute PetCO2 (kPa [mmHg]) 3.2 ± 0.8 (24.1 ± 6.3) 1.0 ± 0.3 (7.7 ± 2.6) <0.001
15 minute PetCO2 (kPa [mmHg]) 3.6 ± 0.9 (27.1 ± 7.2) 1.1 ± 0.4 (7.9 ± 3.5) <0.001
20 minute PetCO2 (kPa [mmHg]) 4.4 ± 1.2 (33.1 ± 9.1) 0.9 ± 0.3 (9.2 ± 2.7) <0.001
Max PetCO2 (kPa [mmHg]) 5.4 ± 1.5 (40.1 ± 12.3) 1.8 ± 0.6 (15.6 ± 4.4) <0.001
Final PetCO2 (kPa [mmHg]) 3.6 ± 0.9 (27.3 ± 7.1) 0.9 ± 0.3 (7.3 ± 2.5) <0.001
  1. Nonshockable' was defined as asystole or pulseless electrical activity. Values are expressed as mean ± standard deviation. PetCO2, partial pressure of end-tidal carbon dioxide; ROSC, restoration of spontaneous circulation.