Table 3:
Variables | Relative Risk | 95% CI | p-value |
---|---|---|---|
Mean PaCO2 | 1.50 | 1.35 – 1.65 | <0.001 |
Mean PaCO2 squared | 0.99 | 0.98 – 0.99 | <0.001 |
VT/VF | 2.06 | 1.69 – 2.50 | <0.001 |
Age* | 0.84 | 0.77 – 0.92 | <0.001 |
Alveolar dead space† (L/min) | 0.90 | 0.84 – 0.97 | 0.004 |
Metabolic Acidosis‡ | 0.60 | 0.45 – 0.82 | 0.001 |
Mean arterial blood pressure (mmHg) | 1.02 | 1.01 – 1.02 | <0.001 |
Percutaneous coronary intervention | 1.62 | 1.26 – 2.09 | <0.001 |
[defined as modified Rankin Scale (mRS) ≤ 3 at hospital discharge] as the dependent variable. Mean partial pressure of arterial carbon dioxide (PaCO2) during the initial six hours after return of spontaneous circulation entered as a continuous variable calibrated for rise in 5 mmHg.
Calibrated for a rise in 10 years
Estimated using corrected minute ventilation for normal PaCO2.
Defined as a base deficit ≤ −6 during the first 6 hours after return of spontaneous circulation.
CI, confidence interval; VT/VF, ventricular tachycardia/ventricular fibrillation. Model has good fit: Deviance test p = 1
Removed for non-significance: cardiac arrest location (p = 0.607); and duration of cardiopulmonary resuscitation (p = 0.500).