Subgroup comparisons of neurologically favourable survival between two bystander CPR groups before propensity score matching
| Subgroup | Type of bystander CPR | Crude OR (95% CI) with compression-only as reference | Adjusted OR (95% CI) with compression-only as reference* | |
| Compression-only | Conventional | |||
| Young generation (<35 years) | ||||
| Total number | 343 | 127 | ||
| Rate, % (n) | 3.8 (13) | 14.2 (18) | 4.19 (1.99 to 8.83) | 3.85 (1.22 to 12.2) |
| middle-aged and older generation (≥35 years) | ||||
| Total number | 6217 | 717 | ||
| Rate, % (n) | 0.5 (28) | 1.3 (9) | 2.81 (1.32 to 5.98) | 2.05 (0.94 to 4.45) |
| Non-medical | ||||
| Total number | 4542 | 641 | ||
| Rate, % (n) | 0.7 (33) | 3.7 (24) | 5.31 (3.12 to 9.05) | 3.20 (1.80 to 5.57) |
| Medical | ||||
| Total number | 2018 | 203 | ||
| Rate, % (n) | 0.4 (8) | 1.5 (3) | 3.77 (1.00 to 14.3) | 2.92 (0.70 to 12.0) |
*The outcomes of out-of-hospital cardiac arrest were compared using univariate and multivariate logistic regression analyses that included year term, age groups, gender, bystander-witnessed, shockable initial rhythm, any prehospital defibrillation and emergency medical service response time interval.
CPR, cardiopulmonary resuscitation.