Table 2: Results of multiple regression model.
| Variable | odds ratio | lower 95%CI | upper 95%CI | probability |
| sex | male | 1 | | | |
| female | 1.00 | 0.97 | 1.40 | 0.88 |
| age | 0–39 | years | 1 | | |
| 40–64 | 0.77 | 0.73 | 0.81 | <0.01 |
| 65–74 | 0.55 | 0.52 | 0.58 | <0.01 |
| 75–84 | 0.37 | 0.35 | 0.39 | <0.01 |
| >=85 | 0.24 | 0.22 | 0.25 | <0.01 |
| year | 2005–2008 | 1 | | | |
| 2009–2012 | 1.54 | 1.49 | 1.59 | <0.01 |
| day & night | day time | 1 | | | |
| night time | 0.78 | 0.76 | 0.81 | <0.01 |
| season | spring | 1 | | | |
| summer | 1.12 | 1.07 | 1.17 | <0.01 |
| autumn | 1.09 | 1.04 | 1.13 | <0.01 |
| winter | 0.98 | 0.94 | 1.02 | <0.01 |
| disease | cardiac | 1 | | | |
| non-cardiac | 0.65 | 0.63 | 0.68 | <0.01 |
| initial ECG | non-VT/VF | 1 | | | |
| VT/VF | 1.99 | 1.89 | 2.11 | <0.01 |
| BCPR | conventional | 1 | | | |
| chest compression | 0.91 | 0.87 | 0.96 | <0.01 |
| respiration | 0.90 | 0.76 | 1.05 | 0.19 |
| none | 0.71 | 0.68 | 0.75 | <0.01 |
| AED | none | 1 | | | |
| by public | 9.49 | 8.70 | 10.34 | <0.01 |
| by EMS | 2.80 | 2.65 | 2.96 | <0.01 |
| by public & EMS | 4.59 | 4.01 | 5.13 | <0.01 |
| adrenalin administration | no | 1 | | | |
| yes | 0.41 | 0.38 | 0.45 | <0.01 |
| doctor on an ambulance | no | 1 | | | |
| yes | 1.06 | 1.02 | 1.11 | <0.01 |
| call-contact interval | ≤10 min | 1 | | | |
| >10 min | 0.59 | 0.57 | 0.62 | <0.01 |
| call-hospital interval | ≤60 min | 1 | | | |
| >60 min | 0.61 | 0.57 | 0.66 | <0.01 |
| intravenous cannulation | no | 1 | | | |
| yes | 0.51 | 0.49 | 0.54 | <0.01 |