Table 3.
Primary logistic regression model of odds of favorable functional survival
| Primary Model | Model with peri-shock pause* | |
|---|---|---|
| Predictor variable | OR (95% CI) | OR (95% CI) |
| Analyze Early | 1 (reference) | 1 (reference) |
| Analyze Late | 0.75 (0.59, 0.96) | 0.83 (0.59, 1.18) |
| Epistry survival rate for a +10% difference | 1.26 (1.05, 1.52) | 1.26 (1.03, 1.53) |
| Interaction between Analyze Late and baseline survival, For a +10% difference | 1.34 (1.07, 1.66) | 1.28 (0.97, 1.70) |
| Peri-shock pause, median from the first three shocks | ----- | |
| <20 seconds | ----- | 1 (reference) |
| ≥ 20 seconds, <40 seconds | ----- | 0.69 (0.51, 0.92) |
| ≥ 40 seconds | ----- | 0.64 (0.38, 1.10) |
| Covariates | ||
| Bystander CPR | 1.25 (1.02, 1.54) | 1.15 (0.86, 1.52) |
| Witnessed arrest | 2.49 (1.95, 3.19) | 2.89 (2.02, 4.14) |
| Age, for 1 year increase | 0.96 (0.95, 0.97) | 0.96 (0.96, 0.97) |
| Public location | 1.82 (1.47, 2.25) | 1.65 (1.24, 2.20) |
| EMS Arrival ≤ 10 minutes | 2.11 (1.23, 3.62) | 2.09 (0.99, 4.41) |
| No obvious cause | 1.35 (0.52, 3.54) | -- |
| Male | 1.01 (0.80, 1.28) | 0.96 (0.69, 1.35) |
| EMS Initial Rhythm | ||
| VF/VT | 1 (reference) | -- |
| PEA | 0.19 (0.14, 0.26) | -- |
| Asystole | 0.03 (0.02, 0.05) | -- |
| Perfusing | 5.17 (1.74, 15.34) | -- |
| AED, no-shock, no-strip | 0.14 (0.08, 0.23) | -- |
Pulseless electrical activity is abbreviated PEA. Model with peri-shock pause is restricted to those presenting with an initial shockable rhythm.
*
Restricted to those with an initial rhythm of ventricular fibrillation