Table 1. Baseline characteristics of OHCA occurred in 2020 and in 2019.
| Variable | 2020 | 2019 | P |
|---|---|---|---|
| n = 694 | n = 520 | ||
| Males, n (%) | 430 (62) | 300 (57.7) | 0.28 |
| Age, years [IQR] | 77 [67–85] | 79 [65–86] | 0.14 |
| Suspected or confirmed COVID-19 infection, n (%) | 139 (20) | 0 (0) | - |
| EMS arrival time, mins [IQR] | 15 [11–19] | 12 [9–15] | <0.001 |
| Etiologies, n (%) | 0.002 | ||
| Medical | 613 (93) | 456 (89) | |
| Trauma | 23 (3.5) | 44 (8.6) | |
| Drowning | 1 (0.2) | 0 (0) | |
| Overdose | 4 (0.6) | 1 (0.4) | |
| Electrocution | 0 (0) | 0 (0) | |
| Asphyxial (external causes) | 21 (3.2) | 10 (2) | |
| Unknown | 32 (4.6) | 9 (1.7) | |
| OHCA locations, n (%) | |||
| Home | 623 (90) | 420 (81) | <0.001 |
| Nursing residence | 33 (4.8) | 37 (7.1) | |
| Workplace | 3 (0.4) | 4 (0.8) | |
| Street | 26 (3.7) | 44 (8.5) | |
| Public building | 4 (0.6) | 9 (1.7) | |
| Sport | 0 (0) | 2 (0.4) | |
| Other | 5 (0.7) | 4 (0.8) | |
| Witnessed status, n (%) | 0.002 | ||
| Unwitnessed | 344 (50) | 219 (42) | |
| Bystander witnessed | 236 (34) | 235 (45) | |
| Witnessed by EMS | 86 (12) | 55 (11) | |
| Unknown | 28 (4) | 11 (2) | |
| Shockable presenting rhythm, n (%) | 56 (8) | 58 (11) | 0.07 |
| 56 (12.5)¥ | 58 (15.5)¥ | 0.2 |
IQR: 25–75 percentile range
EMS: Emergency Medical System
OHCA: out-of-hospital cardiac arrest
CPR: cardiopulmonary resuscitation
ROSC: return of spontaneous circulation
¥ considering only patients with resuscitation attempted