Table 3.
Logistic regression on the effect of good neurologic outcomes showing odds ratio.
| Variables | Poor CPC* (N = 11,459) | Good CPC (N = 958) | Model 1 (univariable) | Model 2 (multivariable) | Model 3 (multivariable with interaction) | |
|---|---|---|---|---|---|---|
| Age | Mean ± SD | 69.8 ± 15.0 | 56.0 ± 13.5 | 0.95 (0.94–0.95, p < .001) | 0.96 (0.96–0.97, p < .001) | 0.96 (0.96–0.97, p < .001) |
| Sex | Female | 4109 (35.9%) | 183 (19.1%) | |||
| Male | 7350 (64.1%) | 775 (80.9%) | 2.37 (2.01–2.79, p < .001) | 1.07 (0.88–1.30, p = .487) | 1.07 (0.88–1.31, p = .472) | |
| Diabetes | No | 8743 (76.3%) | 841 (87.8%) | |||
| Yes | 2716 (23.7%) | 117 (12.2%) | 0.45 (0.37–0.55, p < .001) | 0.67 (0.53–0.85, p < .001) | 0.67 (0.53–0.85, p = .001) | |
| Hypertension | No | 7738 (67.5%) | 694 (72.4%) | |||
| Yes | 3721 (32.5%) | 264 (27.6%) | 0.79 (0.68–0.92, p = .002) | 1.48 (1.23–1.79, p < .001) | 1.48 (1.22–1.79, p < .001) | |
| Bystander witness | No | 5341 (46.6%) | 171 (17.8%) | |||
| Yes | 6118 (53.4%) | 787 (82.2%) | 4.02 (3.39–4.76, p < .001) | 2.20 (1.81–2.67, p < .001) | 2.22 (1.83–2.70, p < .001) | |
| Bystander CPR | No CPR | 5224 (45.6%) | 345 (36%) | |||
| Standard CPR | 337 (2.9%) | 31 (3.2%) | 0.93 (0.64–1.36, p = .716) | 0.71 (0.45–1.10, p = .125) | 1.07 (0.44–2.61, p = .888) | |
| Compression-only CPR | 5898 (51.5%) | 582 (60.8%) | 0.67 (0.58–0.77, p < .001) | 0.82 (0.68–0.99, p = .036) | 0.77 (0.55–1.09, p = .141) | |
| AED | No | 10,577 (92.3%) | 839 (87.6%) | |||
| Yes | 882 (7.7%) | 119 (12.4%) | 1.70 (1.39–2.09, p < .001) | 1.47 (1.13–1.91, p = .004) | 1.43 (1.10–1.86, p = .007) | |
| Place | Public | 3793 (33.1%) | 576 (60.1%) | |||
| Residence | 7666 (66.9%) | 382 (39.9%) | 0.33 (0.29–0.38, p < .001) | 0.65 (0.55–0.76, p < .001) | 0.64 (0.54–0.76, p < .001) | |
| Initial ECG | Non-shockable | 9976 (87.1%) | 180 (18.8%) | |||
| Shockable | 1483 (12.9%) | 778 (81.2%) | 29.08 (24.50–34.50, p < .001) | 17.73 (14.76–21.29, p < .001) | 17.85 (14.85–21.44, p < .001) | |
| DA-CPR | No | 2912 (25.4%) | 300 (31.3%) | |||
| Yes | 8547 (74.6%) | 658 (68.7%) | 0.75 (0.65–0.86, p < .001) | 0.69 (0.57–0.84, p < .001) | 0.53 (0.41–0.70, p < .001) | |
| Standard CPR x DA-CPR | 0.85 (0.30–2.41, p = .756) | |||||
| Compression-only CPR x DA-CPR | 1.93 (1.28–2.91, p = .002) | |||||
| AIC | 4332 | 4326 |
OR Odds ratio; CPC Cerebral performance category; CPR Cardiopulmonary resuscitation; AED Automated electrical defibrillator; ECG Electrocardiography; DA-CPR Dispatcher-assisted CPR; AIC Akaike Information Criterion.
*A CPC score of 1 or 2 was considered a good neurological outcome, and a score of 3, 4, or 5 was considered a poor neurological outcome.