Table 1.
Patient Baseline Characteristics According to AED Feedback
| Audiovisual feedback mechanism | |||||
|---|---|---|---|---|---|
| Variable | N | Overall, N=325*, † | 0, N=170*, † | 1, N=155*, † | P value * , † |
| Age, y, mean (SD) | 325 | 69 (17) | 71 (16) | 68 (17) | 0.11 |
| Sex, male, n (%) | 325 | 227 (70) | 119 (70) | 108 (70) | 0.95 |
| Bystander witnessed, n (%) | 325 | 196 (60) | 107 (63) | 89 (57) | 0.31 |
| Bystander CPR, n (%) | 325 | 314 (97) | 162 (95) | 152 (98) | 0.17 |
| Shockable primary AED rhythm, n (%) | 293 | 125 (43) | 66 (45) | 59 (41) | 0.50 |
| Public place of arrest, n (%) | 325 | 166 (51) | 90 (53) | 76 (49) | 0.48 |
| AED shock before EMS arrival, n (%) | 325 | 134 (41) | 70 (41) | 64 (41) | 0.98 |
| EMS response time, min, median (IQR) | 317 | 6.48 (4.88–8.57) | 6.30 (4.53–7.78) | 7.02 (5.16–9.32) | 0.02 |
| Admission status, n (%) | 325 | 0.12 | |||
| Deceased | 182 (56) | 87 (51) | 95 (61) | ||
| Continuous CPR | 16 (4.9) | 7 (4.1) | 9 (5.8) | ||
| ROSC and comatose | 69 (21) | 44 (26) | 25 (16) | ||
| ROSC and awake | 58 (18) | 32 (19) | 26 (17) | ||
| ROSC upon hospital admission, n (%) | 325 | 127 (39) | 76 (45) | 51 (33) | 0.03 |
| 30‐day survival, n (%) | 325 | 95 (29) | 53 (31) | 42 (27) | 0.42 |
AED indicates automated external defibrillator; CPR, cardiopulmonary resuscitation; EMS, emergency medical services; IQR, interquartile range; and ROSC, return of spontaneous circulation.
*
Mean (SD); n (%); median (IQR).
†
Wilcoxon rank‐sum test; Pearson’s chi‐squared test.