Table 2.
Outcomes from OHCA according to CPR duration
| Total | Outcome (%) | Crude OR | (95% CI) | Adjusted OR | (95% CI) | |
|---|---|---|---|---|---|---|
| 1-month survival | ||||||
| ≤ 20 min | 1084 | 349 (32.2) | Reference | Reference* | ||
| 21–30 min | 3165 | 190 (6.0) | 0.14 | (0.11–0.16) | 0.25 | (0.20–0.31) |
| 31–40 min | 5466 | 93 (1.7) | 0.04 | (0.03–0.05) | 0.08 | (0.06–0.10) |
| 41–60 min | 9378 | 46 (0.5) | 0.01 | (0.01–0.01) | 0.02 | (0.013–0.026) |
| 61–90 min | 3990 | 8 (0.2) | 0.004 | (0.002–0.009) | 0.005 | (0.003–0.011) |
| 91–120 min | 708 | 1 (0.1) | 0.003 | (0.000–0.021) | 0.003 | (0.000–0.023) |
| P for trend† | < 0.001 | < 0.001 | ||||
| Favorable neurological outcome | ||||||
| ≤ 20 min | 1084 | 226 (20.8) | Reference | Reference* | ||
| 21–30 min | 3165 | 37 (1.2) | 0.05 | (0.03–0.06) | 0.15 | (0.10–0.23) |
| 31–40 min | 5466 | 24 (0.4) | 0.02 | (0.011–0.03) | 0.08 | (0.05–0.12) |
| 41–60 min | 9378 | 12 (0.1) | 0.005 | (0.003–0.009) | 0.02 | (0.01–0.031) |
| 61–90 min | 3990 | 2 (0.1) | 0.002 | (0.000–0.008) | 0.004 | (0.001–0.016) |
| 91–120 min | 708 | 0 (0.0) | NA | NA | ||
| P for trend† | < 0.001 | < 0.001 |
OHCA indicates out-of-hospital cardiac arrest; OR, odds ratio; and CI, confidence interval
*Adjusted for age, sex, cardiac etiology of arrest, bystander witness, bystander CPR, first documented rhythm at the scene, prehospital advanced airway management, prehospital adrenaline administration, EMS response time
†CPR duration treated as continuous variable