Table 1.
Baseline characteristics.
| Outcome |
|||
|---|---|---|---|
| Favorable (CPC 1–2), n = 82 | Unfavorable (3–5), n = 53 | p-value | |
| Demographics | |||
| Male sex — no. (%) | 70 (85) | 39 (74) | 0.090 |
| Age — yr | 59 ± 10 | 62 ± 14 | 0.064 |
| Medical history — no. (%) | |||
| Hypertension, medically treated | 37 (45) | 32 (60) | 0.174 |
| Diabetes | 7 (9) | 12 (23) | 0.055 |
| Myocardial infarction | 7 (9) | 5 (9) | >0.999 |
| Atrial fibrillation | 4 (5) | 11 (21) | 0.012 |
| Heart failure | 8 (10) | 5 (9) | 0.726 |
| Asthma or Chronic obstructive pulmonary disease | 9 (11) | 4 (8) | 0.544 |
| Stroke | 5 (6) | 5 (9) | 0.635 |
| Chronic kidney disease | 3 (4) | 5 (9) | 0.348 |
| Conditions of cardiac arrest | |||
| Shockable rhythm — no. (%) | 78 (95) | 39 (74) | <0.001 |
| Witnessed arrest — no. (%) | 76 (93) | 43 (81) | 0.043 |
| First defibrillation by automated external defibrillator — no. (%) | 15 (18) | 4 (8) | 0.074 |
| Bystander cardiopulmonary resuscitation — no. (%) | 68 (83) | 38 (72) | 0.310 |
| Time to return of spontaneous circulation — min | 15 ± 10 | 26 ± 16 | <0.001 |
| Findings and procedures on arrival at hospital | |||
| ST-segment elevation myocardial infarction, no. (%) | 36 (44) | 22 (42) | 0.784 |
| Coronary angiogram obtained — no. (%) | 77 (99) | 41 (80) | <0.001 |
| Percutaneous coronary intervention performed — no. (%) | 41 (53) | 17 (35) | 0.049 |
| pH level | 7.2 ± 0.1 | 7.2 ± 0.2 | 0.664 |
| Lactate level — mmol/liter | 4.7 ± 3.9 | 8.2 ± 5.4 | <0.001 |
Plus–minus values are means ± SD.
CPC, Cerebral Performance Categories Scale (CPC 1 = no symptoms or 2 = moderate disability, CPC 3 = severe disability, 4 = coma or vegetative state, and 5 = death).