Table 1.
Baseline Clinical and Out‐of‐Hospital Circulatory Arrest Characteristics
| Characteristic* |
Patients (n=104) |
CPR injury | P value | |
|---|---|---|---|---|
|
Yes (n=84) |
No (n=20) |
|||
| Age, y | 56±15 | 58±15 | 46±13 | <0.001 |
| Female sex | 31/104 (30) | 25/83 (30) | 6/21 (29) | 1.000 |
| Body mass index, kg/m2 | 25±8 | 24±8 | 27±8 | 0.219 |
| Available medical history | 95 | 77 | 18 | … |
| Hypertension | 38/95 (40) | 32/77 (42) | 6/18 (33) | 0.753 |
| Dyslipidemia | 15/95 (16) | 12/77 (16) | 3/18 (17) | 1.000 |
| Heart failure | 12/95 (13) | 10/77 (13) | 2/18 (11) | 1.000 |
| Diabetes | 19/95 (20) | 17/77 (22) | 2/18 (11) | 0.513 |
| Chronic kidney disease | 12/95 (13) | 10/77 (13) | 2/18 (11) | 1.000 |
| History of coronary artery disease | 11/95 (12) | 9/77 (12) | 2/18 (11) | 1.000 |
| Prior cardiac arrest | 2/95 (2) | 2/77 (3) | 0/18 (0) | 1.000 |
| Prior PCI | 5/95 (5) | 4/77 (5) | 1/18 (6) | 1.000 |
| Prior valvular disease | 5/95 (5) | 4/77 (5) | 1/18 (6) | 1.000 |
| Prior stroke | 6/95 (6) | 3/77 (4) | 3/18 (17) | 0.080 |
| Initial rhythm | 0.778 | |||
| Pulseless electrical activity | 40/104 (38) | 33/84 (40) | 7/20 (35) | |
| VT/VF | 30/104 (29) | 25/84 (30) | 5/20 (25) | |
| Asystole/unknown | 34/104 (33) | 26/84 (31) | 8/20 (40) | |
| Witnessed arrest | 59/99 (59) | 46/79 (58) | 13/20 (65) | 0.621 |
| Bystander CPR | 57/99 (58) | 46/79 (58) | 11/20 (55) | 0.805 |
| Mechanical CPR | 28/104 (27) | 25/84 (30) | 3/20 (15) | 0.263 |
| Mean CPR time, min | 15±11 | 16.1±11.0 | 12.3±8.5 | 0.138 |
Data are shown as number, number/total number (percentage), or mean±SD. CPR indicates cardiopulmonary resuscitation; LV, left ventricle; PCI, percutaneous coronary intervention; VF, ventricular fibrillation; and VT, ventricular tachycardia.
*
Of 104 (91%) patients, 95 had complete past medical history obtained during the hospitalization, resulting in discrepant numbers of total patients and denominators for the patient characteristics.