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Hazard ratios of cardiopulmonary resuscitation group for initial shockable rhythm before/after propensity score matching
| CPR group | Reference | Adjusted hazard ratio | 95% CI | P value |
|---|---|---|---|---|
| DA-CPR | Unassisted CPR | |||
| Before PS matching | 1.00 | 0.99–1.03 | 0.52 | |
| After PS matching | 0.99 | 0.97–1.02 | 0.56 |
CI, confidence interval; CPR, cardiopulmonary resuscitation; DA, dispatcher-assisted; PS, propensity score.
