Table 2.
Results of univariate and multivariate logistic regression analyses for factors associated with one-month outcomes a
| Variables |
Death |
CPC categories 3 to 5 |
||
|---|---|---|---|---|
| Crude OR (95% CI) | Adjusted OR (95% CI) | Crude OR (95% CI) | Adjusted OR (95% CI) | |
| Ageb |
1.02 (1.02 to 1.02) |
1.01 (1.01 to 1.01) |
1.03 (1.03 to 1.03) |
1.03 (1.02 to 1.03) |
| Gender (male) |
1.40 (1.35 to 1.45) |
1.00 (0.96 to 1.05) |
0.53 (0.50 to 0.56) |
0.90 (0.84 to 0.96) |
| Unwitnessed by bystanders |
4.70 (4.54 to 4.88) |
2.18 (2.09 to 2.28) |
7.04 (6.61 to 7.50) |
2.01 (1.87 to 2.17) |
| Unwitnessed by EMS personnel |
3.51 (3.33 to 3.68) |
1.69 (1.59 to 1.81) |
5.10 (4.77 to 5.44) |
2.68 (2.46 to 2.93) |
| No bystander CPR |
1.13 (1.10 to 1.17) |
1.01 (0.97 to 1.06) |
1.29 (1.23 to 1.36) |
1.11 (1.04 to 1.18) |
| Noncardiac etiology |
1.38 (1.34 to 1.43) |
0.93 (0.89 to 0.97) |
3.00 (2.83 to 3.19) |
1.84 (1.71 to 1.99) |
| Unshockable initial rhythm |
10.4 (10.0 to 10.8) |
2.76 (2.54 to 3.01) |
21.6 (20.5 to 22.7) |
3.38 (2.98 to 3.84) |
| No prehospital AED administration |
7.50 (7.25 to 7.76) |
1.54 (1.41 to 1.67) |
15.2 (14.4 to 16.0) |
1.42 (1.24 to 1.61) |
| No prehospital ROSC |
43.4 (41.8 to 45.0) |
25.8 (24.7 to 26.9) |
80.2 (75.5 to 85.2) |
38.4 (35.9 to 41.0) |
| Call-to-response timeb |
1.10 (1.10 to 1.11) |
1.05 (1.04 to 1.06) |
1.13 (1.12 to 1.14) |
1.05 (1.04 to 1.06) |
| Call-to-hospital arrival timeb | 1.02 (1.01 to 1.02) | 1.03 (1.02 to 1.03) | 1.02 (1.02 to 1.02) | 1.02 (1.02 to 1.03) |
aAED, automated external defibrillator; CI, confidence interval; CPC, cerebral performance category; CPR, cardiopulmonary resuscitation; EMS, emergency medical services; OR, odds ratio; ROSC, return of spontaneous circulation. bAdjusted odds ratios are reported for unit odds.