Patientcharacteristics at admission
| Characteristics | Healthy control group (n=40) | Successful resuscitation group (n=85) |
| Age (years), median (IQR) | 64.0 (54.3 to 69.8) | 65.0 (55.0 to 74.0) |
| Male/female (n) | 23/17 | 58/27 |
| Previous medical history, n (%) | ||
| Hypertension | 5 (12.5%) | 38 (44.7%) |
| Diabetes | 3 (7.5%) | 27 (31.8%) |
| Coronary heart disease | 2 (5.0%) | 29 (34.1%) |
| Chronic lung disease | 1 (2.5%) | 9 (10.6%) |
| Chronic kidney disease | 0 | 9 (10.6%) |
| Cardiac arrest cause (n, %) | ||
| Cardiac | 34 (40.0%) | |
| Respiratory | 20 (23.5%) | |
| Cerebral | 23 (27.1%) | |
| Others | 7 (8.2%) | |
| Unknown | 1 (1.2%) | |
| Initial resuscitation | ||
| Time to ROSC (min), median (IQR) | 20.0 (10.0 to 30.0) | |
| Epinephrine (mg), median (IQR) | 2.0 (0.0 to 5.0) | |
| Initial rhythm VF/VT, n (%) | 30 (35.3%) | |
| MAP (mm Hg), median (IQR) | 95.7 (86.0 to 103.2) | 74.3 (56.2 to 97.2) |
| White cell count (×109 /L), median (IQR) | 5.81 (4.85 to 6.53) | 13.56 (10.84 to 18.29) |
| APACHE Ⅱ score, mean±SD | 0 | 32.9±6.5 |
| SOFA score, median (IQR) | 0 | 11.5 (8.5 to 14.0) |
| 28-day mortality, n (%) | 65 (76.5%） | |
| 28-day CPC 1–2, n (%) | 14 (16.5%) |
APACHE II, acute physiology and chronic health evaluation; CPC, cerebral performance category; MAP, mean arterial pressure; ROSC, return of spontaneous circulation; SOFA, sequential organ failure assessment; VF, ventricular fibrillation; VT, ventricular tachycardia.