Characteristics | All patients (N = 2375) | Early CAG (N = 1148) | Deferred/no CAG (N = 1227) | P value |
---|---|---|---|---|
Patient characteristics | ||||
 Male sex | 1652 (69.6) | 791 (47.9) | 861 (52.1) | 0.50 |
 Age in years | 63.3 ± 13.8 | 62.7 ± 12.5 | 64.0 ± 14.9 | 0.02 |
 Hypertension | 839/2041 (41.1) | 411/966 (42.5) | 428/1075 (39.8) | 0.21 |
 Diabetes mellitus | 379/2219 (17.1) | 180/1109 (16.2) | 199/1110 (17.9) | 0.29 |
 Hypercholesterolemia | 288/1211 (23.8) | 128/530 (24.2) | 160/681 (23.5) | 0.88 |
 Previous cardiac arrest | 21/1003 (2.1) | 9/577 (1.6) | 12/426 (2.8) | 0.17 |
 Previous myocardial infarction | 495/2189 (22.6) | 231/1100 (21.0) | 264/1089 (24.2) | 0.07 |
 Previous CVA or TIA | 43/690 (6.2) | 24/357 (6.7) | 19/333 (5.7) | 0.64 |
 Chronic kidney disease | 69/1141 (6.0) | 20/586 (3.4) | 49/555 (8.8) | < 0.001 |
 Previous renal replacement therapy | 15/1009 (1.5) | 7/579 (1.2) | 8/430 (1.9) | 0.40 |
Pre-hospital characteristics | ||||
 Arrest witnessed | 981/1227 (80.0) | 495/608 (81.4) | 486/619 (78.5) | 0.20 |
 First rhythm | < 0.001 | |||
  VF/VT | 1009/1193 (84.6) | 572/614 (93.2) | 437/579 (75.5) |  |
  PEA | 57/1193 (4.8) | 12/614 (2.0) | 45/579 (7.8) |  |
  Asystole | 127/1193 (10.6) | 30/614 (4.9) | 97/579 (16.8) |  |
 Time from arrest to BLS in minutes | 3 [1–5] | 3 [1–5] | 3 [1–5] | 0.40 |
 Time from arrest to ROSC in minutes | 15 [10–23] | 15 [10–23] | 15 [10–23] | 0.69 |
Characteristics on hospital arrival | ||||
 Glasgow Coma Scale < 8 | 1374/1533 (89.6) | 639/735 (86.9) | 735/798 (92.1) | 0.001 |
 Signs of STEMI on ECG | 543/1965 (27.6) | 410/969 (42.3) | 133/996 (13.4) | < 0.001 |
 CT scan performed | 320/751 (57.4) | 205/378 (54.2) | 115/373 (30.8) | < 0.001 |
Laboratory values upon admission | ||||
 pH | 7.2 [7.1–7.3] | 7.2 [7.1–7.3] | 7.2 [7.1–7.3] | 0.05 |
 Lactate, mmol/L | 5.9 [3.5–9.1] | 5.5 [3.5–8.8] | 6.2 [3.7–9.4] | 0.01 |
 Hemoglobin, mmol/L | 8.4 ± 1.3 | 8.5 ± 1.2 | 8.3 ± 1.3 | 0.001 |
 Hematocrit | 0.40 ± 0.06 | 0.41 ± 0.1 | 0.39 ± 0.1 | 0.001 |
 Leukocytes, ·109/L | 12.5 [9.8–16.7] | 12.6 [10.0–17.0] | 12.2 [9.4–16.1] | 0.07 |
 CRP, mg/L | 5 [3–17] | 4 [3–16] | 5 [3–19] | 0.15 |
 Creatinine, µmol/L | 98 [82–117] | 96 [81–114] | 100 [82–120] | 0.001 |
 Creatinine > 130 µmol/L | 366/2342 (15.6) | 148/1134 (12.9) | 218/1208 (17.8) | 0.001 |