Table 2 Utstein clinical and laboratory features in each of the four clusters (imputed model)
Characteristics | Cluster 1 N = 1619 | Cluster 2 N = 1528 | Cluster 3 N = 727 | Cluster 4 N = 571 | P valuea |
|---|---|---|---|---|---|
Prehospital characteristics | |||||
 Males, n (%) | 1344 (83) | 822 (54) | 472 (65) | 474 (83) | < 0.001 |
 Age (years), median [IQR] | 58 [49–68] | 69 [60–80] | 61 [50–72] | 53 [44–61] | < 0.001 |
 Witnessed, n (%) | 1615 (100) | 1528 (100) | 299 (41) | 561 (98) | < 0.001 |
 Bystander CPR, n (%) | 1324 (82) | 1208 (78) | 6 (0.9) | 466 (82) | < 0.001 |
 OHCA in public area, n (%) | 1032 (64) | 358 (23) | 167 (23) | 315 (55) | < 0.001 |
 Shockable rhythm, n (%) | 1511 (93) | 324 (21) | 142 (19) | 370 (65) | < 0.001 |
 No-flowb (min), median [IQR] | 2 [0–5] | 2 [0–5] | 15 [10–20] | 2 [0–5] | < 0.001 |
 Low-flowc (min), median [IQR] | 18 [10–26] | 20 [13–30] | 25 [15–34] | 80 [52–100] | < 0.001 |
 ST-segment elevation, n (%) | 1149 (71) | 334 (22) | 227 (31) | 278 (49) | < 0.001 |
 Epinephrine dose (mg) Median [IQR] | 0 [0–2] | 2 [1–4] | 3 [1–4] | 8 [5–11] | < 0.001 |
Hospital management | |||||
 TTM, n (%) | 1142 (71) | 601 (39) | 335 (46) | 280 (49) | < 0.001 |
 Vasoactive drugs, n (%) | 902 (56) | 986 (65) | 552 (76) | 525 (92) | < 0.001 |
 Angioplasty success, n (%) | 933 (58) | 69 (4.5) | 68 (9.4) | 176 (31) | < 0.001 |
 Lactate (mmol/L), median [IQR] | 3.4 [1.9–5.7] | 6.5 [3.4– 11.0] | 8.1 [4.2– 13.0] | 12.4 [8.5– 17.0] | < 0.001 |
 Creatinine (µmol/L), median [IQR] | 97 [78–121] | 124 [93–170] | 124 [93–164] | 132 [105–160] | < 0.001 |
 Patients treated with ECMO, n (%) | 107 (7) | 39 (3) | 23 (3) | 359 (63) | < 0.001 |
 Follow-up (days), median [IQR] | 6 [3–10] | 2 [1–7] | 2 [1–6] | 1 [0–4] | < 0.001 |