Early vs. later survival to hospital discharge, stratified by site. Early survival includes individuals surviving up to one calendar day after cardiac arrest. Later survival includes early survivors progressing to hospital discharge. Odds ratios referenced to largest site and adjusted for age, sex, public location, witnessed arrest, bystander CPR, and bystander AED use. Based upon those with known initial ECG rhythm and with complete covariates.
| Early Survival |
Later Survival |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unadjusted Model |
Site Effect |
Adjusted Model |
Site Effect |
Unadjusted Model |
Site Effect |
Adjusted Model |
Site Effect |
|||||||
| Site | N | OR | 95% CI | p-value | OR | 95% CI | p-value | N | OR | 95% CI | p-value | OR | p-value | |
| Initial ECG VF/VT | ||||||||||||||
| 1 | 764 | (ref) | <0.001 | (ref) | <0.001 | 202 | (ref) | <0.001 | (ref) | <0.001 | ||||
| 2 | 671 | 1.06 | (0.84, 1.34) | 1.08 | (0.85, 1.38) | 186 | 0.48 | (0.32, 0.73) | 0.42 | (0.27, 0.66) | ||||
| 3 | 623 | 2.33 | (1.86, 2.92) | 2.44 | (1.93, 3.08) | 285 | 0.78 | (0.54, 1.14) | 0.84 | (0.56, 1.26) | ||||
| 4 | 244 | 1.02 | (0.74, 1.42) | 1.06 | (0.73, 1.54) | 66 | 0.26 | (0.14, 0.46) | 0.29 | (0.14, 0.59) | ||||
| 5 | 418 | 3.28 | (2.56, 4.22) | 2.87 | (2.20, 3.73) | 227 | 1.23 | (0.82, 1.84) | 1.09 | (0.70, 1.69) | ||||
| 6 | 409 | 1.60 | (1.24, 2.07) | 1.39 | (1.05, 1.84) | 150 | 1.03 | (0.66, 1.61) | 1.21 | (0.73, 2.00) | ||||
| 7 | 233 | 1.68 | (1.23, 2.29) | 1.44 | (1.04, 2.01) | 88 | 1.23 | (0.71, 2.11) | 1.12 | (0.62, 2.01) | ||||
| 8 | 181 | 1.30 | (0.92, 1.85) | 1.10 | (0.76, 1.60) | 58 | 1.06 | (0.57, 1.97) | 1.05 | (0.54, 2.07) | ||||
| 9 | 123 | 1.54 | (1.03, 2.30) | 1.49 | (0.98, 2.27) | 44 | 0.74 | (0.38, 1.45) | 0.86 | (0.42, 1.76) | ||||
| 10 | 97 | 0.35 | (0.18, 0.68) | 0.33 | (0.17, 0.65) | 11 | 0.90 | (0.26, 3.18) | 0.70 | (0.18, 2.77) | ||||
| Total | 3,763 | 1,318 | ||||||||||||
| Initial ECG non-VF/VT | ||||||||||||||
| 1 | 2,712 | (ref) | <0.001 | (ref) | <0.001 | 180 | (ref) | <0.001 | (ref) | 0.02 | ||||
| 2 | 1,891 | 1.19 | (0.95, 1.49) | 1.14 | (0.90, 1.43) | 147 | 0.78 | (0.48, 1.26) | 0.85 | (0.52, 1.40) | ||||
| 3 | 1,361 | 1.25 | (0.98, 1.60) | 1.26 | (0.98, 1.62) | 111 | 0.80 | (0.47, 1.35) | 0.82 | (0.48, 1.41) | ||||
| 4 | 1,223 | 1.59 | (1.25, 2.02) | 1.40 | (1.05, 1.87) | 124 | 0.75 | (0.45, 1.25) | 0.78 | (0.42, 1.45) | ||||
| 5 | 934 | 2.36 | (1.86, 2.98) | 2.43 | (1.91, 3.12) | 134 | 1.37 | (0.86, 2.19) | 1.35 | (0.83, 2.22) | ||||
| 6 | 776 | 2.27 | (1.77, 2.93) | 1.87 | (1.42, 2.46) | 108 | 0.99 | (0.59, 1.66) | 1.16 | (0.65, 2.07) | ||||
| 7 | 877 | 1.79 | (1.38, 2.32) | 1.47 | (1.12, 1.92) | 99 | 1.40 | (0.84, 2.34) | 1.56 | (0.90, 2.70) | ||||
| 8 | 447 | 1.89 | (1.37, 2.62) | 1.57 | (1.12, 2.19) | 53 | 1.42 | (0.75, 2.67) | 1.48 | (0.75, 2.89) | ||||
| 9 | 404 | 1.72 | (1.21, 2.43) | 1.59 | (1.12, 2.28) | 44 | 0.72 | (0.34, 1.52) | 0.77 | (0.35, 1.68) | ||||
| 10 | 254 | 1.33 | (0.84, 2.12) | 1.02 | (0.63, 1.64) | 22 | 0.10 | (0.01, 0.78) | 0.11 | (0.01, 0.82) | ||||
| Total | 10,879 | 1,022 | ||||||||||||