Table 4.
Logistic regression on the effect of survival to discharge showing odds ratio.
| Variables | No survival discharge (N = 10,987) | Survival to discharge (N = 1430) | Model 1 (univariable) | Model 2 (multivariable) | Model 3 (multivariable with interaction) | |
|---|---|---|---|---|---|---|
| Age | Mean ± SD | 70.0 ± 15.0 | 58.7 ± 14.5 | 0.96 (0.95–0.96, p < .001) | 0.97 (0.96–0.97, p < .001) | 0.97 (0.96–0.97, p < .001) |
| Sex | Female | 3969 (36.1%) | 323 (22.6%) | |||
| Male | 7018 (63.9%) | 1107 (77.4%) | 1.94 (1.70–2.21, p < .001) | 1.05 (0.90–1.22, p = .530) | 1.05 (0.91–1.22, p = .500) | |
| Diabetes | No | 8375 (76.2%) | 1209 (84.5%) | |||
| Yes | 2612 (23.8%) | 221 (15.5%) | 0.59 (0.50–0.68, p < .001) | 0.85 (0.71–1.02, p = .080) | 0.85 (0.71–1.02, p = .082) | |
| Hypertension | No | 7402 (67.4%) | 1030 (72%) | |||
| Yes | 3585 (32.6%) | 400 (28%) | 0.80 (0.71–0.91, p < .001) | 1.27 (1.09–1.48, p = .002) | 1.27 (1.09–1.47, p = .002) | |
| Bystander witness | No | 5221 (47.5%) | 291 (20.3%) | |||
| Yes | 5766 (52.5%) | 1139 (79.7%) | 3.54 (3.10–4.05, p < .001) | 2.27 (1.96–2.64, p < .001) | 2.29 (1.97–2.66, p < .001) | |
| Bystander CPR | No CPR | 4989 (45.4%) | 580 (40.6%) | |||
| Standard CPR | 324 (2.9%) | 44 (3.1%) | 1.17 (0.84–1.62, p = .351) | 0.78 (0.53–1.14, p = .195) | 0.75 (0.33–1.67, p = .476) | |
| Compression-only CPR | 5674 (51.6%) | 806 (56.4%) | 1.22 (1.09–1.37, p < .001) | 1.05 (0.90–1.22, p = .521) | 0.70 (0.52–0.94, p = .018) | |
| AED | No | 10,172 (92.6%) | 1244 (87%) | |||
| Yes | 815 (7.4%) | 186 (13%) | 1.87 (1.57–2.21, p < .001) | 1.45 (1.18–1.79, p < .001) | 1.43 (1.16–1.76, p < .001) | |
| Place | Public | 3560 (32.4%) | 809 (56.6%) | |||
| Residence | 7427 (67.6%) | 621 (43.4%) | 0.37 (0.33–0.41, p < .001) | 0.66 (0.58–0.76, p < .001) | 0.66 (0.57–0.75, p < .001) | |
| Initial ECG | Non-shockable | 9659 (87.9%) | 497 (34.8%) | |||
| Shockable | 1328 (12.1%) | 933 (65.2%) | 13.65 (12.07–15.44, p < .001) | 8.80 (7.69–10.07, p < .001) | 8.85 (7.73–10.12, p < .001) | |
| DA-CPR | No | 2756 (25.1%) | 456 (31.9%) | |||
| Yes | 8231 (74.9%) | 974 (68.1%) | 0.72 (0.63–0.81, p < .001) | 0.75 (0.64–0.88, p < .001) | 0.62 (0.51–0.76, p < .001) | |
| Standard CPR x DA-CPR | 1.15 (0.46–2.87, p = .769) | |||||
| Compression-only CPR x DA-CPR | 1.74 (1.24–2.44, p = .001) | |||||
| AIC | 6559 | 6552 |
OR Odds ratio; CPR Cardiopulmonary resuscitation; AED Automated electrical defibrillator; ECG Electrocardiography; DA-CPR Dispatcher-assisted CPR; AIC Akaike Information Criterion.